EP3040785B1 - Date display device of a timepiece - Google Patents

Description

Technical area

The present invention relates to a date display mechanism, and in particular a date display mechanism of the "big date" type.

State of the art

The conventional date display devices for timepieces, and in particular portable wristwatches, most often use a ring of the annular calendar comprising 31 regularly distributed display sectors, each of the sectors comprising an indication corresponding to the one of the possible dates of the month. The date disc is indexed by one position every day, so as to show through a window the date value corresponding to each day, which is formed of one or more digits. The angular sector occupied by each indexing position is thus relatively small (360/31 is a little less than 12 degrees), which greatly limits the maximum size of the numbers that can be displayed.

In order to increase the size of the indications displayed in the window to read the date, there are therefore systems using two distinct mobiles, one for the display of the tens digit and the other for the display of the digits digit. date units. This type of date display is referred to by combining two figures carried by two distinct mobiles as a "big date" type display. These display devices are coupled to a control device for respectively indexing each of the mobiles in order to display each day the exact combination between the units and the tens.

For example, a "big date" type display mechanism comprising a ring of units comprising the sequence 0-9 of the units is known, and a tens disk comprising a sequence of 4 digits 0-3 distributed over sectors of about 90 degrees each, like the one described in the patent EP2490083 . A schedule mobile of 31 sectors, driven at a rate of one step per day, meshes on two dissociated planes with respectively a tens and a ring of units, respectively to drive the units disc every day, except for passage of the ^31st calendar at the first of the following month with 30 teeth followed by a toothless sector - the ^31st of program date wheel - and the tens disc is driven only 4 times month for passage to the next ten months and the change (9-> 10, 19-20,29-30 and 31-> 01) with long teeth respectively provided on the 9 ^th, 19 ^th, 29 ^e and 31 ^th sector of the 31 gear sectors of the program wheel, and which causes a cross solidarity in rotation of the mobile tens. A disadvantage of this type of calendar mechanism is to require a very large number of parts, which are dissociated for the control mechanism and display, and thus greatly encumber the platen. Moreover, the cross associated with the tens disk has a very small number of teeth, which is detrimental to the gear reliability because of the large angular steps required at each indexing.

The document DE20103818U discloses a date display device of a "big date" type for a watch movement comprising a first mobile for displaying the units and a second mobile for displaying the tens, said first and second mobiles are arranged to display the date values by combination of indications carried by said first mobile and indications carried by said second mobile, said first mobile carries a first series of indications of consecutive unit numbers on ten first display segments regularly distributed on angular sectors of said first mobile, said second mobile carries a second series of indications for displaying digits of tens of said calendar on ten second display segments evenly distributed on angular sectors of said second mobile.

Brief summary of the invention

An object of the present invention is to provide a date display mechanism free of these known limitations.

Another object of the present invention is to provide a new type of date-type date display mechanism by combining two mobiles for at least some dates, using original display indication sequences.

These aims are attained in particular by virtue of the characteristics of a date display device of the big date type according to the main claim.

Particular embodiments of the invention are defined in the dependent claims.

An advantage of the present invention is to allow a better balance between the indications carried by the two mobiles, by increasing the number of display segments of the tens disk. The number of display segments being identical for each of the two mobiles, the display indications carried by each of them are regularly distributed equally, which allows to better adjust the size of the characters for a combined display. Moreover, the increase in the sequence of indications carried by the display disk dozens makes it easier and more reliable each indexing.

Another advantage of the proposed solution is that it makes it possible to reduce the number of parts necessary for producing the display device, by incorporating into the display mobiles functional parts for programming the indexing sequences in cycles equal to 10.

According to a preferred embodiment, the two display mobiles are formed by rotary elements of substantially annular shape, that is to say whose display indications sweep a complete annular segment extending over 360 degrees during a cycle, typically monthly. When the indications of the two mobiles are arranged to cover the same annular surface and are superimposed on each other at least for certain calendars, the display is confined in a reduced space and the control mechanism can even advantageously be integrated in the center of the ring to gain compactness. Moreover, in this case, the fact that the display cycles are both equal for each of the two mobiles makes it possible to facilitate the mutual programming with the aid of superposed gear segments.

Brief description of the figures

• Les figures 1A et 1B illustrent respectivement un premier mobile des unités ainsi qu'un deuxième mobile des dizaines modifié, et les figures 1C et 1D d'autres pièces constitutives utilisées par le dispositif d'affichage de grande date selon un mode de réalisation préférentiel de l'invention;
• les figures 2A,2B, 2C et 2D illustrent des vues respectivement de dessus et de dessous du premier et du second mobile des figures 1A et 1B, mettant en évidence différents éléments d'embrayage mutuel ainsi que les différentes dentures agissant dans des plans d'engrenage distincts pour l'entraînement journalier du mécanisme de quantième et la correction de la date selon un mode de réalisation préférentiel du dispositif d'affichage de grande date selon l'invention;
• Les figures 3A et 3B illustrent respectivement une vue en trois dimensions du mécanisme d'engrenage des différentes dentures du premier et du second mobile avec la roue entraîneuse de 24 heures, et une vue en coupe des différents plans d'engrenage de chacune de ces dentures pour l'exemple du passage du 31^e quantième du mois au 1^er quantième du mois suivant, selon un mode de réalisation préférentiel du dispositif d'affichage de grande date selon l'invention;

• Les figures 4A et 4B illustrent respectivement une vue en trois dimensions du mécanisme d'engrenage des différentes dentures du premier et du second mobile avec le mobile de correction, et une vue en coupe des différents plans d'engrenage de chacune de ces dentures pour l'exemple du passage du 31^e quantième du mois au 1^er quantième du mois suivant, selon un mode de réalisation préférentiel du dispositif d'affichage de grande date selon l'invention;
• la série des figures 5A,5B,5C,5D,5E,5F illustre différentes vues pour expliquer le mécanisme d'indexation du premier et du second mobile selon un mode de réalisation préférentiel, lors d'une première séquence pour les quantièmes dont les unités sont comprises de 2 à 9. Les figures 5A,5B et 5C illustrent respectivement le quantième à travers un guichet du cadran, et les positions relatives des premier et deuxièmes mobiles, vu de dessus et de dessous, pour le 2^e quantième du mois, et les figures 5D,5E, et 5F les mêmes vues qu'aux figures 5A,5B et 5C précédentes mais après le passage au 3^e quantième du mois;
• la série des figures 6A,6B,6C,6D,6E,6F, et 6G illustre différentes vues pour expliquer le mécanisme d'indexation du premier et du second mobile selon un mode de réalisation préférentiel, lors d'une deuxième séquence pour le passage du quantième à la dizaine supérieure (9->10,19->20,29->30). Les figures 6A,6B et 6C illustrent respectivement le quantième à travers un guichet du cadran, et les positions relatives des premier et deuxièmes mobiles, vu de dessus et de dessous, pour le 9^e quantième du mois, et les figures 6D,6E, et 6F les mêmes vues qu'aux figures 6A,6B et 6C précédentes mais après le passage au 10^e quantième du mois; la figure 6G illustre quant à elle une vue détaillée montrant l'engrenage d'une lamelle du premier mobile avec un tenon du second mobile pour leur entraînement mutuel en rotation;
• la série des figures 7A,7B,7C,7D,7E,7F illustre différentes vues pour expliquer le mécanisme d'indexation du premier et du second mobile selon un mode de réalisation préférentiel lors d'une troisième séquence pour le passage d'une dizaine ronde au quantième suivant se terminant par « 1 » (10->11, 20->21, 30->31). Les figures 7A,7B et 7C illustrent respectivement le quantième à travers un guichet du cadran, et les positions relatives des premier et deuxièmes mobiles, vu de dessus et de dessous, pour le 10^e quantième du mois, et les figures 7D,7E, et 7F les mêmes vues qu'aux figures 7A,7B et 7C précédentes mais après le passage au 11^e quantième du mois;
• la série des figures 8A,8B,8C,8D,8E,8F illustre différentes vues pour expliquer le mécanisme d'indexation du premier et du second mobile selon un mode de réalisation préférentiel lors d'une quatrième séquence pour le passage des quantième se terminant par 1 aux quantièmes se terminant par « 2 » (01->02, 11->12, 21->22). Les figures 8A,8B et 8C illustrent respectivement le quantième à travers un guichet du cadran, et les positions relatives des premier et deuxièmes mobiles, vu de dessus et de dessous, pour le 11^e quantième du mois, et les figures 8D,8E, et 8F les mêmes vues qu'aux figures 8A,8B et 8C précédentes mais après le passage au 12^e quantième du mois; et enfin
• la série des figures 9A,9B,9C,9D,9E,9F illustre différentes vues pour expliquer le mécanisme d'indexation du premier et du second mobile selon un mode de réalisation préférentiel lors d'une cinquième séquence pour le passage du dernier quantième 31 au premier quantième du mois suivant (31->01). Les figures 9A,9B et 9C illustrent respectivement le quantième à travers un guichet du cadran, et les positions relatives des premier et deuxièmes mobiles, vu de dessus et de dessous, pour le 31^e quantième du mois, et les figures 9D,9E, et 9F les mêmes vues qu'aux figures 9A,9B et 9C précédentes mais après le passage au 1^er quantième du mois suivant; et
• la figure 10 illustre une vue schématique des chaînes cinématiques et du mécanisme d'embrayage bi-directionnel entre les deux mobiles d'affichage employé selon un mode de réalisation préférentiel de la présente invention.

Examples of implementation of the advantageous invention are given by way of non-limiting example in the description and illustrated by the appended figures in which:

• The Figures 1A and 1B respectively illustrate a first mobile of the units as well as a second mobile of the modified tens, and the Figures 1C and 1D other component parts used by the large date display device according to a preferred embodiment of the invention;
• the Figures 2A, 2B, 2C and 2D illustrate respectively top and bottom views of the first and second mobiles of Figures 1A and 1B , highlighting different mutual clutch elements as well as the different teeth acting in separate gear planes for the daily training of the date mechanism and the correction of the date according to a preferred embodiment of the display device of the large date according to the invention;
• The Figures 3A and 3B respectively show a three-dimensional view of the gear mechanism of the different teeth of the first and second movable with the driving wheel of 24 hours, and a sectional view of the various gear plans of each of these teeth for example the passage 31 ^e of the month to ¹ day of the following month, according to a preferred embodiment of the big date display device according to 'invention;

• The Figures 4A and 4B respectively illustrate a three-dimensional view of the gear mechanism of the different teeth of the first and second mobile with the correction mobile, and a sectional view of the different gear planes of each of these teeth for the example of the passage of the ^31st of the month to ¹ day of the next month, according to a preferred embodiment of the big date display device according to the invention;
• the series of FIGS. 5A, 5B, 5C , 5D, 5E, 5F illustrates different views to explain the indexing mechanism of the first and second mobile according to a preferred embodiment, in a first sequence for the dates with units of 2 to 9. FIGS. 5A, 5B and 5C respectively illustrate the date through a wicket of the dial, and the relative positions of the first and second mobiles, seen from above and from below, for the 2 ^nd calendar of the month, and the Figures 5D, 5E, and 5F the same views as FIGS. 5A, 5B and 5C previous but after passing the ^3rd of the month;
• the series of Figures 6A, 6B, 6C , 6D, 6E, 6F , and 6G illustrates different views to explain the indexing mechanism of the first and second movable according to a preferred embodiment, during a second sequence for the changeover from date to top ten (9->10,19-> 20,29 -> 30). The FIGS. 6A, 6B and 6C respectively illustrate the date through a wicket of the dial, and the relative positions of the first and second mobiles, seen from above and from below, for the 9 ^th calendar of the month, and the Figures 6D, 6E, and 6F the same views as FIGS. 6A, 6B and 6C previous but after passing the ^10th of the month; the figure 6G illustrates a detailed view showing the gear of a lamella of the first mobile with a pin of the second mobile for their mutual rotation training;
• the series of FIGS. 7A, 7B, 7C , 7D, 7E, 7F illustrates different views to explain the indexing mechanism of the first and second movable according to a preferred embodiment in a third sequence for the passage of a dozen round to the next date ending in "1"(10-> 11 , 20-> 21, 30-> 31). The Figures 7A, 7B and 7C respectively illustrate the date through a wicket of the dial, and the relative positions of the first and second mobiles, seen from above and from below, for the 10 ^th calendar of the month, and the Figures 7D, 7E, and 7F the same views as Figures 7A, 7B and 7C previous but after passing the ^11th of the month;
• the series of Figures 8A, 8B, 8C , 8D, 8E, 8F illustrates different views to explain the indexing mechanism of the first and second movable according to a preferred embodiment in a fourth sequence for the passage of the date ending with 1 to the date ending with "2"(01-> 02 , 11-> 12, 21-> 22). The Figures 8A, 8B and 8C respectively illustrate the date through a wicket of the dial, and the relative positions of the first and second mobiles, seen from above and from below, for the 11 ^{th day} of the month, and the Figures 8D, 8E, and 8F the same views as Figures 8A, 8B and 8C previous but after passing the ^12th of the month; and finally
• the series of Figures 9A, 9B, 9C , 9D, 9E, 9F illustrates different views to explain the indexing mechanism of the first and second mobile according to a preferred embodiment in a fifth sequence for the passage of the last date 31 to the first calendar of the following month (31-> 01). The Figures 9A, 9B and 9C illustrate the calendar through a window of the dial, and the relative positions of the first and second movable, seen from above and from below, by 31 ^th of the month, and Figures 9D, 9E, and 9F the same views as Figures 9A, 9B and 9C preceding but after passing the ^1st day of the following month; and
• the figure 10 illustrates a schematic view of the kinematic chains and bi-directional clutch mechanism between the two mobiles display apparatus employed according to a preferred embodiment of the present invention.

Example (s) of Embodiments of the Invention

The Figures 1A and 1B respectively illustrate two mobiles used for the large date type display according to a preferred embodiment of the invention.

The first mobile M1 of the Figure 1A consists of a mobile units conventionally provided with 10 first display segments respectively referenced S10, S11, S12, S13, S14, S15, S16, S17, S18 and S19, regularly spaced and preferably arranged at the periphery of the first mobile M1 , each corresponding to one of the numbers U of a first series of indications I1 , corresponding here to the complete series of the ten units 0-9. All directions i1 of the first series of indications I1 are preferably mutually separated from each other by recesses V, to facilitate the display by combination with a tens digit of at least certain dates, and in particular for allow the juxtaposition of a unit digit U to a digit tens of d in a window, the number of tens d then taking the location left free by the recess V. It will be understood however that for such a radial display, the V recesses could also be replaced by any type of spacing allowing a combination display by transparency through this mobile.

The second mobile M2 consists of a mobile "tens""modified", in that it is also provided with second segments of displays referenced S20, S21, S22, S23, S24, S25, S26, S27, S28 and S29, regularly distributed angularly, and preferably arranged at its periphery. Each of the second display segments is associated with a second indication i2 of a second series of indications I2 each comprising about ten calendar days d . The second set of indications I2 consists, according to the preferred embodiment of the Figure 1B at I2 = {0X, 0X, 1X, 1X, 1X, 2X, 2X, 2X, 3X and 3X} where the value "X" indicates a first spacing V0, a second spacing V1 or a third spacing V2 or any digit value, an indication of the first mobile M1 being here preferably intended to be superimposed on it, especially for a combination with the first mobile M1 of the Figure 1A . The number of indications of the ^2nd series I2 directions is thus not equal to 4 as in the display solutions Big traditional date, but equal to that of the first mobile M1, and the number of segments of This arrangement is particularly advantageous for setting up a control device with superposed gear sectors, which allows significant gains in space requirements, especially when each of two mobile M1, M2 display has a substantially annular shape, that is to say whose geometric shape obtained by scanning all indications during a display cycle corresponds to a ring, releasing space in its center to place a control mechanism for scheduling dates. The first mobile display M1 and the second display mobile M2 can advantageously be arranged in the form of concentric rings.

The first mobile M1 is provided at its inner periphery with a first main gear D1 provided for the gearing with a drive wheel, as typically a 24-hour drive wheel R, illustrated later on in FIG. figure 1C , as well as the second mobile M2, which comprises a second main gear D2 also on its inner periphery for the gear with the same drive wheel R. According to the shape of the mobiles and the arrangement chosen for the display by combination of the two However, it will be understood that the gear teeth may also be located on their outer periphery, or on the outer periphery of one and the inner periphery of the other.

On the Figure 1B We can distinguish three types of references for spacing after tens digits on the ^2nd mobile M2: the 1 ^st recesses V0 for a combined display with the number "0" of ¹ mobile M1, the ^2nd recesses V1, to a combined display with the number "1" of ¹ mobile M1, and finally a 3 ^rd recess V2, one of which here corresponds to the positioning of the ^2nd strip L2, and is provided to allow the display by combining the numbers 2 to 9 of the first mobile. In fact, when the ^3rd recess corresponding to the reference V2 is in front of the display window - preferably a first window F1 and F2 a second window to dissociate tens of U units it is known that one is in a display phase corresponding to the one indexing sequence ^era, explained below in view of the series of Figures 5A-F , where the numbers of units 2-9 of the ^1st mobile M1 scroll.

• une première encoche E1 pour le passage 01->02,
• une deuxième encoche E2 pour le passage 11->12, et enfin
• une troisième encoche E3 pour le passage 21->22,

Ces trois encoches E1,E2,E3, et leur positionnement relatif par rapport à la deuxième lamelle L2 sont visibles sur les séries des figures 5 à 9 relatives aux 5 séquences d'indexation caractéristiques du mécanisme de commande préférentiel pour la mise en oeuvre du dispositif d'affichage selon l'invention, détaillées ci-après.On the Figure 1A it can be seen the presence of a first lamella L1, at the display segments referenced S10-S11. This first flexible lamella L1 is intended, as will be seen later, to act as driving element of the second mobile M2 by the first mobile M1 during the indexing of certain dates, including the passage of tens thanks to the collaboration with respectively a first post T1, a second post T2 and a third post T3 integral with the second mobile M2, visible on the Figure 1B And which are arranged here in a plane perpendicular to the display plane, is also a direction parallel to the axis of joint rotation of the first mobile M1 and the 2 ^nd mobile M2. Similarly, we can see on the Figure 1B the presence of a second lamella L2 provided for driving the first movable M1 by the ^2nd mobile M2 during indexing certain other calendars, including the passage of dates ending with the number "1" are those ending with "2", thanks to the collaboration with notches arranged on the inside perimeter of the first mobile M1, that is to say:

• a first notch E1 for the passage 01-> 02,
• a second notch E2 for the passage 11-> 12, and finally
• a third notch E3 for the passage 21-> 22,

These three notches E1, E2, E3, and their relative positioning with respect to the second lamella L2 are visible on the series of Figures 5 to 9 on the 5 indexing sequences characteristic of the preferred control mechanism for the implementation of the display device according to the invention, detailed below.

As can be seen from the Figures 1A and 1B each of the first and second mobiles uses exactly the same number of display indications, i.e. the number of first indications i1 of the first set of indications I1 of the first mobile M1 is identical to the number of second indications i2 of the second set of indications I2 of the second mobile M2, both equal to 10. These two sets of indications are, moreover, distributed over the same number of display segments, which means that each indication is not never repeated more than once during each cycle, and maximizes the size of each display segment and therefore the size of the displayed numbers. We are thus in a situation where the gearing mechanism is facilitated for the tens, each angular sector corresponding to a display segment being 360/10 = 36 degrees, or about three times less than the solution using a cross of Usual Malta for the tens. According to the preferred embodiment described, the first size, second and third spacings V0, V1, V2 after the tens digits d, and recesses V between the numbers u units are preferably all identical, both in size and angular sector occupation which makes the display particularly homogeneous and reliable for indexing.

According to an alternative variant not illustrated, it would be possible to repeat one or the other of the first and second series of indications I1 or I2 - and preferably both at the same time in order to superimpose sectors and teeth of gearing by a common drive mechanism - several times over a multiple of 10 corresponding display segments, for example 20, or 30 segments. It should be understood, however, that a variant with 30 or more display segments is not of great interest in maximizing the size of the displayed digits as compared to existing large date mechanisms.

• le premier mobile M1 porte une première série d'indications I1 = {Ø,1-9} comprenant les premiers chiffres d'unité u1 = {1,2,3,4,5,6,7,8,9}, c'est-à-dire la série complète des unités 0-9 tronquée du deuxième chiffre u2 = 0 reporté sur le 2^e mobile M2, un espace Ø remplaçant ici le chiffre 0 au niveau du premier segment d'affichage S10 ; en conséquence le 2^e mobile M2 porte une deuxième série d'indications I2 = {0X,0X,10,1X,1X,20,2X,2X,30,3X}. Selon cet exemple, c'est le deuxième chiffre d'unité u2 = 0 remplace le premier espacement V0 sur le 2^e mobile M2 au niveau des deuxièmes segments d'affichage S23,S26 et S29 tandis que les 2^e et troisième espacements V1,V2 sont toujours présents, matérialisés par les « X »; cette 2^e série pourrait ainsi être réécrite {0-V1,0-V2,10,1-V1,1-V2,20,2-V1,2.V2,30,3-V1};
• le premier mobile M1 porte une autre première série d'indications I1 = {Ø,Ø,2-9} comprenant les premiers chiffres d'unité u1 = {2,3,4,5,6,7,8,9}, c'est-à-dire cette fois la série complète des unités tronquée de d'une deuxième suite U2 de deuxièmes chiffres u2 = {0,1} reportés sur le 2^e mobile M2 en lieu et place respectivement du premier espacement V0 et V1, de telle sorte qu'une deuxième série d'indications convenable pour le 2^e mobile M2 pourrait être I2 = {01,0X,10,11,1X,20,21,2X,30,31}, où les « X » de la série correspondent au 3^e espacement V2. Dans ce cas, par rapport au 1^er mobile M1 de la figure 1A deux espaces Ø, Ø remplaceraient ici les chiffre 0 et 1 agencés consécutivement au niveau des premiers segments d'affichage S10 et S11, et sur le 2^e mobile M2, les premier espacements V0 seraient remplacés par un « 0 » au niveau des deuxièmes segments d'affichage S23,S26 et S29, et les deuxièmes espacements V1 seraient remplacés par un « 1 » au niveau des deuxièmes segments d'affichage S20,S21,S24 et S27;
• le premier mobile M1 porte encore une autre première série d'indications I1 = {Ø,Ø,Ø,3-9} comprenant les premiers chiffres d'unité u1 = {3,4,5,6,7,8,9} précédés de trois espaces Ø disposés respectivement au niveau des premiers segments d'affichage S10,S11,S12. Dans ce cas, c'est la deuxième suite U2 de deuxièmes chiffres u2 = {0,1,2} qui serait reportée sur le 2^e mobile M2 en lieu et place respectivement des premier, deuxième et troisièmes espacements V0, V1, V2 et une deuxième série d'indications convenable pour le 2^e mobile M2 pourrait être I2 = {01,02,10,11,12,20,21,22,30,31}. Par rapport au mode de réalisation du paragraphe précédent le 2^e mobile M2 a été modifié en remplaçant simplement les 2^e espacements V2 au niveau des 2^e segments d'affichage S22,S25 et S28 par des « 2 ».

Although in what follows, we will describe a first mobile M1 and thus a first set of indications I1 consisting of a series of complete units 0-9, it will be understood, in view of the following and the programming mechanism and of the two mobile 10-segment display, that the first mobile M1, if it still comprises ten equal display segments evenly distributed angularly, could also consist of one or more spaces followed by a series of truncated numbers units, which would be reported on the second mobile M2 dozens. In this case, one could separate a first series of first figures U1 u1 units, which are displayed by the ^1st mobile M1, a second suite U2 ^2nd figures u2 units, which are those displayed by the 2nd mobile, in combination with the ^1st . In this case, ^2nd digit u2 units {0,1,2} would be arranged on the 2 ^nd mobile M2 tens respectively the locations where the first V0 spacings are, ^2nd V1 spacing and ^3rd V2 spacings. Can thus be given by way of nonlimiting example, alternative embodiments for the present invention wherein ¹ mobile M1 and the two mobile ^e each comprise 10 display segments and wherein:

• the first mobile M1 carries a first set of indications I1 = {Ø, 1-9} comprising the first unit numbers u1 = {1,2,3,4,5,6,7,8,9}, c that is to say the complete set of truncated units 0-9 of the second digit u2 = 0 transferred to the 2 ^nd mobile M2, Ø space here replacing the number 0 at the first display segment S10; accordingly the ^2nd mobile M2 carries a second series of indications I2 = {0X, 0X, 10,1X, 1X, 20,2X, 2X, 30,3X}. According to this example, the second digit of unit u2 = 0 replaces the first V0 spacing on the ^2nd mobile M2 at the second display segments S23, S26 and S29 while the ^2nd and third spacings V1, V2 are always present, materialized by the "X"; this ^2nd series could well be rewritten {0-V1.0-V2,10,1-V1,1-V2,20,2-V1,2.V2,30,3-V1};
• the first mobile M1 carries another first set of indications I1 = {Ø, Ø, 2-9} comprising the first unit numbers u1 = {2,3,4,5,6,7,8,9}, that is to say that once the complete set of truncated units of a second sequence of second digit U2 u2 = {0,1} transferred to the 2 ^nd mobile M2 in lieu of the first spacing V0 and V1 respectively , so that a second set of directions suitable for the 2 ^nd mobile M2 could be I2 = {01,0X, 10,11,1X, 20,21,2X, 30.31}, where "X" in the series correspond to the ^3rd V2 spacing. In this case, with respect to the mobile M1 of the ¹ Figure 1A two spaces Ø, Ø replace here the digit 0 and 1 arranged consecutively at the first display segments S10 and S11, and the 2 ^nd mobile M2, the first V0 spacings would be replaced by a "0" at the second segments S23, S26 and S29, and the second spacings V1 would be replaced by a "1" at the second display segments S20, S21, S24 and S27;
• the first mobile M1 still carries another first set of indications I1 = {Ø, Ø, Ø, 3-9} comprising the first unit numbers u1 = {3,4,5,6,7,8,9} preceded by three spaces Ø respectively arranged at the first display segments S10, S11, S12. In this case, this is the second sequence of second digit U2 u2 = {0,1,2} would be transferred to the 2 ^nd mobile M2 instead respectively of the first, second and third spacings V0, V1, V2 and a second series of indications suitable for the ^2nd mobile M2 could be I2 = {} 01,02,10,11,12,20,21,22,30,31. Compared to the embodiment of the previous paragraph the ^2nd mobile M2 was changed by simply replacing the ^2nd V2 spacing at the ^2nd display segments S22, S25 and S28 by "2".

These alternative embodiments all have in common to truncate a second sequence U2 of 2 ^nd digits u2 whose number is between 1 and 3, and which begins with the digit "0", of the first mobile M1, to replace each digit by a space Ø on the corresponding display segment, while the sequence of the second indications I2 is always composed of two consecutive indications for the display of the digit "0" of ten, followed by three consecutive indications for the display of the number "1" of ten, then three consecutive indications for the display of the digit "2" of ten, and finally two consecutive indications for the display of the digit "3" of ten on the ten second segments of display of the ^2nd mobile M2, with the combination of the second or u2 numbers with dozens of figures when necessary.

It will be understood from the foregoing that these non-illustrated alternative embodiments are given solely by way of non-limiting example to understand the operation of the claimed invention, the superposition of the first indications of the first mobile M1 being superimposable, because of their size identical to the second information of the second mobile M2, the latter at the ^2nd window F2 of the display window, shown in particular in Figures 5A , 6A , 7A , 8A , 9A following. Therefore it is the number of units of the first set of instructions I1 that appears in this ^2nd window, and the number displayed or the corresponding reference to a particular type of recess in the ^2nd mobile M2 here is that to better identify a particular indexing sequence associated with it. It will be understood in particular that for example a second series of indications comprising no space such that I2 = {01,02,10,11,12,20,21,22,30,31} is entirely compatible with a first M1 mobile units complete as shown in the Figure 1A .

According to these preferred variants where certain numbers of units are transferred to the second mobile M2 some calendars will then no longer require a combination with the first mobile M1, and we can refer to such date values as "second date" Q2, c that is to say the values of full calendar displayed by the second mobile M2, as opposed to the first calendars Q1 whose display is achieved by combination indications of the first mobile 1 and indications of the ^2nd mobile M2.

In the following description will be described in detail a programming mechanism associated with display mobiles using the first mobile M1 of units illustrated by the Figure 1A and the second mobile M2 dozens illustrated by the Figure 1B ; be understood that this programming mechanism is applicable to all the previously mentioned variants where some of the units are transferred from the first mobile M1 to the ^2nd mobile M2. No modification is necessary either to the preferred embodiment associated with the first clutch mechanism 120 and the second clutch mechanism 210, schematically illustrated in FIG. figure 10 following, and which would always preferably concern the passage from the dates respectively to the top ten (9-> 10, 19-> 20, 29-> 30) and the passage of the units from 1 to 2 (01-> 02, 11- > 12, and 11-> 21).

The figure 1C illustrates a top view of a drive mechanism intended to be integrated inside the space released in the center of the two mobiles M1, M2 display. It distinguishes the road M0 movement, which drives, through a gear ratio appropriate, a driving wheel R 24 hours so that the latter makes exactly one full turn each day. This driving wheel R furthermore comprises a daily gear sector Re in which are preferably arranged two teeth in two different gear planes, that is to say the first gear tooth Rd1 and the second gear tooth. 'Rd2 daily gear - visible on the Figures 3A and 3B - intended to mesh respectively with the first main gear D1 of the first mobile M1, arranged on its inner periphery, and the second main gear D2 of the second mobile M2, also arranged on the inner periphery thereof, thus forming an embodiment of the first main kinematic chain C1 and the second main kinematic chain C2, schematically illustrated in FIG. figure 10 , With an advantageous special case or the link is direct between the driving wheel and respectively R ¹ and the 2 ^nd mobile M2, without requiring any intermediate part. Similarly, a correction mobile B, commonly called a "walkman", comprises a series of four correction teeth of identical profile - first correction tooth b1, second correction tooth b2, third correction tooth b3 and fourth correction tooth b4 - mutually spaced 90 degrees, to provide a good gear safety and a sufficiently fast scrolling when it is actuated, for example by means of a ring. These teeth of the corrector mobile B are intended to drive respectively with a first auxiliary toothing D1 'of the first mobile M1, and a second auxiliary toothing D2' of the second mobile M2, located in gear planes separate from those of the main teeth, as illustrated. further using pairs of Figures 3A-3B and 4A, 4B . The direct connection of the corrective mobile B to the first auxiliary toothing D1 'of the first mobile M1, and respectively to the second auxiliary toothing D2' of the second mobile M2 form a first auxiliary kinematic chain C1 'and a second auxiliary kinematic chain C2' completely disjointed main cinematic chains, also illustrated on the figure 10 described in detail below, corresponding to each mobile display. The proposed arrangement has the same advantage of saving parts as for the driving wheel R since the connection is direct between the corrective mobile B and each mobile, without requiring any intermediate part. The corrective mobile B can be located in any angular sector inside the space released in the center of the display rings of the first mobile M1 and the second mobile M2, which leaves a great flexibility of arrangement among the other 9 possible angular positions, each corresponding to another display segment that used by the drive wheel R. The auxiliary teeth can then be obtained by simple circular rotation relative to the main teeth. The diametrically opposite position of the correction mobile B and the driving wheel R of 24 hours corresponds to a particular case but is not an essential configuration for carrying out the invention; a particular case where the driving wheel R and the corrector mobile B are coaxial, rotating around two dissociated guns, would be even possible, to the extent that the gear planes of each of the 4 teeth mentioned above are completely dissociated.

In order to maintain the first mobile M1 and the second mobile M2 in indexed positions, respectively a first jumper J1 and a second jumper J2 mutually superimposed but dissociated from each other, as can be seen on the figure 3A following, are planned; they are arranged for example at the same given display segment and are interposed between two teeth of the teeth of each mobile. The thickness of each jumper preferably extends over the main gear planes and auxiliary gear of each mobile, so that the holding in an indexed position can always be performed for each mobile, that is to say say the first mobile M1 and the second mobile M2, in the proposed configuration with a driving wheel R of 24 hours and a correction mobile B diametrically opposed, because the jumper of each mobile (J1 for M1, and J2 for M2) will come always supported, between two consecutive display segments, on at least a first tooth of a main or auxiliary gear plane of this mobile and a second tooth of a main gear plane or auxiliary of this mobile. In other words, never the main and auxiliary teeth of each mobile simultaneously present two toothless gear sectors consecutive with such a 24-hour drive wheel arrangement R and correction mobile B.

The figure 1D shows a preferred version of a holding plate P for the drive elements illustrated in FIG. figure 1C previously described. Dotted lines are arrows pointing on the axes of the correction mobile B, the roadway M0, and the driving wheel R of 24 hours. The holding plate P contains, according to this preferred embodiment, a fixed gear sector K extending substantially over the width of a display segment and which is intended, as will be seen with the aid of FIG. sequence of gear illustrated on the series of figures 6 following, in particular to allow the passage from the date to the top ten thanks to a clutch element preferably consisting of a flexible blade of the type of the first lamella L1 illustrated on the Figure 1A .

• un premier secteur édenté dans le plan d'engrenage principal P2 du deuxième mobile M2, référencé a21, placé au niveau du segment d'affichage S29 de la figure 1B, en dessous de l'indication d'affichage « 3X »;
• un deuxième secteur édenté dans le plan d'engrenage principal P2 du deuxième mobile M2, référencé a22, placé au niveau du segment d'affichage S22 de la figure 1B, en dessous de l'indication d'affichage « 0X »;
• un troisième secteur édenté dans le plan d'engrenage principal P2 du deuxième mobile M2, référencé a23, et placé au niveau du segment d'affichage S25 de la figure 1B, en dessous de l'indication d'affichage « 1X »;

Similairement, la série de secteurs édentés dans le plan d'engrenage auxiliaire du deuxième mobile M2 comprend:

• un premier secteur édenté dans le plan d'engrenage auxiliaire P2' du deuxième mobile M2, référencé a21', au niveau du segment d'affichage S24 de la figure 1B, juste en dessous de l'indication d'affichage « 1X » et du premier tenon T1;
• un deuxième secteur édenté dans le plan d'engrenage auxiliaire P2' du deuxième mobile M2, référencé a22', au niveau du segment d'affichage S27 de la figure 1B, juste en dessous de l'indication d'affichage « 2X » et du 2^e tenon T2; et enfin
• un troisième secteur édenté dans le plan d'engrenage auxiliaire P2' du deuxième mobile M2 référencé a23', au niveau du segment d'affichage S20 de la figure 1B, juste en dessous de l'indication d'affichage « 3X » et du 3^e tenon T3.

The Figures 2A and 2B illustrate respectively top and bottom views of the second mobile M2 of the Figure 1B , while the Figures 2C and 2D inversely illustrate a view from below and from above of the first mobile M1 of the Figure 1A . The Figure 2A resumes the second sequence of indications I2 {0X, 0X, 1X, 1X, 1X, 2X, 2X, 2X, 3X, 3X}, with the first spacings V0 for the display in combination with the indication "0" of the 1 ^st mobile M1, the second spacings V1 for the display in combination with the indication "1" of ¹ mobile M1, and the ^3rd V2 spacings for display in combination with all other figures of the series of units 2 -9. According to variants, these spaces could be replaced by recesses or notches in the second moving, size preferably corresponding to that of the corresponding indications ¹ mobile M1, that is to say the figures of the first series of indications I1 . For the sake of clarity, none of these spacings are referenced on the Figure 2B , where the correspondence with the tens digit to which these spacings are juxtaposed is no longer discernible. Although we can see a similar internal toothing of the second mobile M2 on the Figures 2A and 2B , in reality these teeth correspond to the first auxiliary main teeth mentioned above in connection with the description of the figure 1C , and which are intended to mesh with different mobiles in different planes. So on the Figure 2A , The teeth shown corresponds to the second auxiliary teeth D2 'of the ^2nd mobile M2, which meshes with the mobile corrector B in a second auxiliary plane P2', while the toothing shown in Figure 2A corresponds to the second main gear D2 of the second mobile M2 meshing with the driving wheel R of 24 hours in a second main plane P2. Each of the second primary and auxiliary gears D2 and D2 'has respectively a first series A2 of edentulous sectors, and a second series of edentulous sector A2', respectively arranged in the second main plane P2 and the second auxiliary plane P2 '. These two series of edentulous sectors are planned to allow the indexation of the first mobile M1 2-9 to scroll the series of units in relation to each of the sectors on which are arranged the ^3rd V2 spacings for a combination display, while the second movable M2 remains in place. Each of the first and second edentulous sector series A2 and A2 'respectively comprise three edentulous sectors, which are derived from one another by circular permutation as a function of the relative positions of arrangement of the driving wheel R of 24 hours relative to that of the The angular positioning of the gear segments of the second mobile unit M2 is defined according to the position of the window on the dial and that of the drive wheel R of 24 hours, so that each of the sectors edentulous is located opposite the driving wheel R of 24 hours when the 3 ^rd V2 spacings of the wheel 2 of the mobile ^e are displayed in the window. According to the preferred embodiment described and illustrated, as will be seen from the series of Figures 5 to 9 following illustrating the various indexing sequences, the display window is at 9 o'clock on the dial, and the 24-hour driving wheel and the correction wheel are respectively arranged at about 5 o'clock and 11 o'clock on the platen. The edentulous sectors of each of the wheels were annotated on the Figures 2A and 2B to match this configuration, with:

• a first edentulous sector in the main gear plane P2 of the second mobile M2, referenced a21, placed at the level of the display segment S29 of the Figure 1B below the display indication "3X";
• a second edentulous sector in the main gear plane P2 of the second mobile M2, referenced a22, placed at the level of the display segment S22 of the Figure 1B below the display indication "0X";
• a third edentulous sector in the main gear plane P2 of the second mobile M2, referenced a23, and placed at the level of the display segment S25 of the Figure 1B below the display indication "1X";

Similarly, the edentulous sector series in the auxiliary gear plane of the second mobile M2 comprises:

• a first edentulous sector in the auxiliary gear plane P2 'of the second mobile M2, referenced a21', at the level of the display segment S24 of the Figure 1B just below the display indication "1X" and the first post T1;
• a second edentulous sector in the auxiliary gear plane P2 'of the second mobile M2, referenced a22', at the level of the display segment S27 of the Figure 1B , Just below the display indication "2X" and the ^2nd pin T2; and finally
• a third edentulous sector in the auxiliary gear plane P2 'of the second mobile M2 referenced a23', at the level of the display segment S20 of the Figure 1B , Just below the display indication "3X" and the ^3rd pin T3.

The two series of edentulous sectors A2 and A2 'described above are, moreover, visible on the Figure 1B , Though not referenced for the sake of clarity, with the respectively small and medium arcs facing the edentulous areas of the ^2nd main set of teeth D2 and ^2nd auxiliary teeth D2 'of the ^2nd mobile M2.

All main and auxiliary gear planes P1, P2, P1 'and P2' are illustrated on the Figures 3B and 4B below. On the Figure 2A , we can if not yet distinguish the first ten drive T1 of the first ten, ie for the passage of 09 ^e to 10 calendar, the second tenon drive T2 of the second decade, that is to say for passage of the 19 ^th to 20 ^th calendar, and finally the third pin T3 for driving the third decade, i.e. for the passage of the 29 ^th to 30 ^th calendar. The angular positioning of the drive pins depends on the relative position between the window, the fixed gear sector K, and the first flexible lamina L1 on which the latter acts to rotate the ^2nd mobile M2, pushing this first lamella L1 radially outward in an active position "PE" said driving position, illustrated in detail by the figure 6G ; the configuration proposed corresponds to that of a gear sector positioned at about 11 o'clock, and a first lamella L1 disposed at the level of the display segments corresponding to those of the unit unit "0" truncated for a window of display arranged at 9 o'clock on the dial; However, it will be understood from the foregoing that other arrangements are possible without departing from the scope of the present invention.

The Figures 2C and 2D show respectively a bottom and top view of the first mobile M1 of the units in which, apart from the sequence of the 10 unit U numbers of units 0-9, there is also a first plate L1 for driving the unit. second M2 mobile using tenons T1, T2, T3 described above, integral with the mobile ^e 2, and according to the same principle as for Figures 2A and 2B previous, a main and auxiliary toothing arranged on the same gear segments superimposed but intended to mesh in separate planes respectively with the drive wheel R of 24 hours for a daily gear, and with a correction mobile B for a correction manual date on request. On the 2D figure , the first main gear D1 is identical to that shown on the Figure 1A with 10 evenly distributed display segments of the same angular value, for meshing in a first main gear plane P1 with the driving wheel R of 24 hours. In this first gear main plane P1, there are a main toothless sector referenced a1, shown in Black for reasons of clarity as opposed to other sectors 9, which aims to enable the indexing of mobile ^e 2 while leaving 1 ^st mobile immobile M1. This type of indexing is in the preferred embodiment described, essential for the passage of the 31 ^th calendar one month at ¹ day of the following month. Similarly, on the Figure 2C , the first auxiliary toothing D1 'is intended to mesh in a first auxiliary plane P1 with the corrective mobile B, and there is a corresponding auxiliary tooth sector a1', also shown in black.

In view of the series of Figures 2A, 2B, 2C and 2D , we can notice that the positioning of edentulous sectors corresponding to each plane gear ratio for each same mobile can be deduced by axial symmetry with respect to a vertical axis, since the top and bottom views are symmetrical about a horizontal axis, and the arrangement of the two driving mobiles, namely the wheel R driving and correction mobile B are arranged symmetrically with respect to the center of the movement plate. The composition of an axial symmetry and a central symmetry actually consists of an axial symmetry along an axis orthogonal to the previous, precisely the vertical axis which allows to deduce the auxiliary teeth from the main teeth of each mobile.

On the Figure 2C is also highlighted a last drive member to enable mutual coupling between the ^1st mobile M1 and the 2 ^nd mobile M2, namely the notches E1, E2 and E3, which are intended to cooperate with ^2nd lamella L2 for driving the mobile M1 ¹ by the 2 ^nd mobile M2. The first mobile M1 comprises three notches, for the training of the date ending "1" to the date ending in "2" according to the preferred embodiment described. More specifically, the first notch E1, E2 ^2nd notch and the third notch E3 are distributed over a ring 10 of gear segments distributed regularly here at its inner circumference, which may correspond to the first display segments S10- S19 or slightly offset from them. The first notch E1 and the third notch E2 are spaced apart by 3 segments, the second notch E2 and the third notch E3 are equally spaced by 3 segments, and therefore the third notch E3 and the first notch E1 being spaced apart by 4 segments. The positioning of this series of notches depends on the position of the ^2nd strip L2 on the ^2nd mobile M2 and also to that of the dial of the display window. The first notch E1 must be, according to the preferred embodiment described where the second lamella L2 is positioned at the level of the display segment S22 of FIG. Figure 1B , Corresponding to the indication "0X" associated with ^3rd V2 spacing configured to drive the first mobile M1 when passes from 01-02, such that the second L2 lamina then cooperates with the ^2nd notch E2 for the date passes from the 11 and 12, and finally with the ^3rd notch E3 for the date passes from the 21 to 22. Thus, when switching from the ^31st day of the month to ¹ of the following month, the second blade L2 will be located offset from a segment relative to the first E1 and notch in such a configuration, due to the edentation ¹ mobile M1 - main toothless sector referenced a1 - unlike other calendars ending with "1" earlier, the mobile M1 ¹ will not be driven by mobile ^e 2 to complete the cycle of 31 days of the month. This gear mechanism is explained in light of the illustrations of the series of Figures 8A-F and 9A-F following, which explain in detail respectively the 4th indexing sequence for the passage of dates ending in 1 (01,11,21) to the following ending in 2 (02,12,22) and the 5 ^th indexing sequence corresponding to the particular case of the passage 31 ^e to ¹ calendar of the next month.

The Figures 3A and 3B respectively illustrate a three-dimensional view of the gear mechanism of the different teeth of the first and second movable with the driving wheel R 24 hours and in particular the first main gear D1 meshing in the first main gear plane P1 and the second main gear D2 meshing in the second main gear plane. The sectional view of the figure 3B showing the particular arrangement of all gear planes, including auxiliary gear planes of each mobile, referenced P1 'for the 1 ^st mobile and P2' respectively for the two mobile ^e, with each of the drive teeth in the passage 31 ^e of the month to ¹ day of the next month. According to the preferred embodiment described, the first main D1 of the 1 ^st mobile tooth is supposed to present a toothless sector a1, while the main set of teeth D2 of the ^2nd mobile tooth, therefore, the first gear tooth Rd1 the driving wheel R in the first main plane P1 does not allow to drive the first mobile M1, while the second Rd2 tooth gear engages the drive wheel R in the second principal plane P2 with a tooth of the teeth D2 of the ^2nd mobile M2. On the figure 3A it can be seen that the first auxiliary toothing D1 'does not present a tooth on this gear sector either, which makes it possible to separate the different gear planes, which succeed one another in the following order, from high to high. bottom: P1, P1 ', P2', P2, clearly visible on the figure 3B . We can nevertheless see on this same figure 3A that the gear sector adjacent the top has a uniform toothing D1, D1 'and D2, D2' with teeth which extend over the entire thickness of the first mobile M1, and that of the ^2nd mobile M2 . It is this thickness that may extend each jumper retaining respectively the first jumper J1 for mobile 1 ^{st, 2nd} and jumper J2 to the two mobile ^e. Such an arrangement of mobile with display segments and totally superimposed gear teeth on the inner perimeter of annular parts for the ^1st and ^2nd mobile (M1, M2) therefore not only provides a space saving , but also considerably simplifies the implementation of the calendar display scheduling mechanism.

The Figures 4A and 4B similarly illustrate respectively a three-dimensional view of the gear mechanism of the different teeth of the first and second mobile M1, M2 with the corrector mobile B, and in particular the auxiliary toothings for the same example of the passage 31 ^e of the month to 1 ^1st calendar of the following month. As explained above, the corrective mobile B meshes not in the first and second main gear planes P1, P2 of each mobile, but in a first and a second auxiliary gear plane P1 ', P2', which are affixed to one another and respectively sandwiched between the first and second main gear planes P1, P2, which makes it possible to machine the corrector mobile B with a certain thickness of toothing allowing the joint drive of the two mobiles in two adjacent planes, thus avoiding machining two teeth of the same profile, but meshing in two non-adjacent disjoint planes, like the first and second gear tooth Rd1 and Rd2 of the drive wheel R. Such an arrangement therefore reduces production costs. Whatever the location of the corrector mobile B on the plate, it must be ensured that this mobile can mesh with one of its four teeth b1-b4 identical profile and regularly distributed at its outer periphery (on the Figure 4A It will be the ^2nd tooth b2 when the mobile corrector B will be actuated). According to the preferred embodiment, the teeth are four in number and mutually spaced by 90 degrees, but it will be understood that adjusting the number of teeth at the periphery of the corrective mobile B will determine the speed of correction: the greater the number of teeth. teeth will be high, more correction operations will be fast. One of the four teeth b1-b4 of the corrective mobile B thus meshes with the two auxiliary gear teeth, whose profile is identical, for a given gear sector, to that of the main teeth with which meshes, at the same time. moment, the driving wheel R 24 hours. So we can see that on the Figure 4B there is necessarily an auxiliary toothed sector - referenced a1 '- at the first auxiliary gearing D1' in the first auxiliary gear plane P1 ', since there was a main toothed sector referenced a1 at the first gearing main gear D1 in the first main gear plane P1 (see figure 3B ); similarly there will be a tooth at the second auxiliary toothing D2 'for this gear sector in the second auxiliary gear plane P2', since there was one at the second main gear D2 in the second gearing main gear plan P2 (see Figures 3B and 4B by comparing).

It will be understood from the example described above, corresponding to the fifth gear sequence described elsewhere below in connection with the series of Figures 9A-F , in connection with the series of Figures 2A-F previously described that each of the first and second movable M1, M2 respectively has a first and a second main gear D1, D2 daily gear meshing selectively with a driving wheel R 24 hours depending on the date, that is to say the current date value, depending on the presence or absence of a tooth or not. The entrainment wheel R so is the starting point of the first main driveline C1 for driving the first mobile M1, and also the starting point of the ^2nd main driveline C2 for driving the ^2nd mobile M2. The different teeth thus form a first part of a global programming mechanism, for the respective direct drive of each of the two display mobiles. The scheduling mechanism of the date display is then completed by the second part consisting of the mutual and bidirectional clutch mechanism between the first and the second mobile at certain dates, or according to the preferred example described and illustrated by the figures. , for the tens of dates (09-> 10, 19-> 20, 29-> 30) and the calendars whose units go from 1 to 2 (01-> 02, 11-> 12, 21-> 22).

The figure 10 is a schematic view explaining the principle of operation of the bi-directional clutch mechanism between the two display mobiles according to the invention, preferably the first illustrated mobile M1 to the Figure 1A 2 and the mobile ^e illustrated in Figure 1B , according to which the control mechanism starts from the base movement driving in rotation a road M0, meshing directly with a driving wheel R performing a complete rotation every 24 hours for an indexing display device proposed once every day, as well as an independent corrective unit B, actuated in rotation for example by an external control rod, such as that illustrated in FIG. figure 1C previous.

The first mobile M1 is thus selectively driven, directly or indirectly, and according to the value of the current date, by the driving wheel R 24 hours via a first kinematic chain, while the second mobile M2 is also selectively driven, directly or indirectly and according to the value of the current date, by the same driving wheel R of 24 hours via a second separate and independent kinematic chain, as according to some mechanisms of the prior art mentioned above. Nevertheless, for certain calendars, and according to the preferred embodiment described and illustrated by the following figures, for example the passage of the ^9th to the ^10th day of the month of 19 ^th to 20 ^th day of the month, and then the ^29th to ^30th day of the month, a first clutch mechanism 120 of the first mobile M1 to the second M2 mobile can drive the ^2nd mobile M2 by the first mobile M1, without that the latter is directly driven by the driving wheel R 24 hours, and conversely, for the passage of ¹ to 2 ^nd, 11 ^th 12 ^th, and finally the 21 ^st to 22 ^th day of the month, a second clutch mechanism 210 of the second mobile M2 to the ^1st mobile M1 allows involve the 1 ^st mobile M1 M2 by the second mobile, without the latter being directly driven by the driving wheel R 24 hours. These clutch mechanisms are therefore useful, according to the preferred embodiment described, respectively for the second indexing sequence, illustrated by the series of Figures 6A-G following, and the fourth indexing sequence, illustrated by the series of Figures 8A-F following.

The figure 10 refers to the two sets of two main kinematic chains C1 / C2 and auxiliary C1 '/ C2', and two series of corresponding gear planes P1 / P2 and P1 '/ P2', previously described in connection with the Figures 3A-B and 4A-B The first plane P1 of the main corresponds to the gear wherein the drive wheel meshes with the main D1 1 of the first mobile toothing ^era M1 via the first gear tooth of Rd1, the second main gear plane P2 is one in which engages the ^2nd main set of teeth D2 of the ^2nd mobile M2 meshes with a ^2nd Rd2 gear tooth of the entrainment wheel A. Similarly, ¹ auxiliary gear plane P1 'is one in which engages the 1 auxiliary toothing ^era D1 ^'1 mobile M1 with one of the teeth of the corrector mobile B, and the ^2nd auxiliary gear plane P2' refers to one in which engages the ^2nd auxiliary teeth D2 'of the 2 ^nd mobile M2 with one of the teeth of the movable checker B. the 1 ^st and 2 ^nd main kinematic chains C1 / C2 depart from the entrainment wheel R to respectively the 1 ^st and 2 ^nd mobile M1 / M2, and the 1 ^st and 2 ^th auxiliary kinematic chains C1 '/ C2' depart mobil e corrector B respectively to the 1 ^st and 2 mobile ^e M1 / M2. According to the preferred embodiment described, no intermediate gear mobile is required in each of the kinematic chains between respectively the driving wheel R, the corrective mobile B, and each of the display mobiles, which allows a significant saving of number of parts to implement for the realization of the proposed display device.

The first clutch mechanism 120 of the first mobile M1 to the second mobile M2, is preferably constituted, according to the preferred embodiment described, by driving tenons (respectively first, second and third post T1, T2, T3) by the first lamella L1 3 times during a cycle of a month of 31 days, the first lamella L1 itself being secured to the first mobile M1 having 10 display segments and therefore having a smaller cycle of 10 positions indexed to the maximum. An active position of the lamella L1 - referenced "PE" for "driving position" on the figure 6G - is determined by the fixed gear sector K, arranged on the plate P, which extends at least over the width of a display segment and shall allow at least the drive of the 2 ^nd mobile M2 for the passage tens upper, that is to say the transition from the ^9th to the ^10th calendar of 19 ^th to 20 ^th calendar, and 29 ^th to 30 ^th calendar. It will be understood that according to a variant not illustrated, this fixed gear sector K could extend over a greater width and thus maintain the driving position "PE" of the first lamella L1 not only for the passages at the top ten elicited , but also the transition from "0" to "1" which follows, that is to say for indexing corresponding to the ^3rd indexing sequence described below in view of the series of Figures 7A-F .

The second clutch mechanism 210 of the second mobile unit M2 towards the first mobile unit M1 consists, as for it, according to the preferred embodiment described, in a drive of oriented notches (respectively first, second and third notches E1, E2, E3 ) by a second blade L2, integral with the second mobile M2, and arranged obliquely toward the inner perimeter of the ^1st mobile M1. According to the mode of preferential embodiment described, the presence of three predefined spaced notches (according 3/3/4 cycle of 10 equidistant angular segments) is necessary to allow the gear from ¹ to 2 ^e and 11 ^e to 12 ^e, and finally from the 21 ^st to the 22 ^nd date, then not to train for the last day of the month, that is to say the 31 ^th which ends nevertheless also by the number "1".

Although according to the preferred embodiment proposed, the first and second clutch mechanisms 120,210 between the two display mobiles, use flexible strips cooperating respectively with tenons and notches, it will be understood that other variants are possible, using other types of drive elements and in particular double teeth having a suitable profile. For example, a pivoting retractable tooth could replace the first flexible lamella L1 and still be actuated in the active position by means of the fixed gear sector K; it could also be replaced by a long tooth, and also mesh with another type of drive element, such as for example a radial advance in the gear plane of the pivoting tooth replacing the tenons, which functionally represent only stop members, and therefore do not necessarily consist of pins arranged along the common axis of rotation of the two mobiles, perpendicular to their display plane, as in the preferred embodiment illustrated. Similarly, other drive members and stops could be employed for the second clutch mechanism 210, which does not necessarily require a flexible member. Thus a double toothing with a profile arranged on the 1 ^st mobile M1 cooperate with another profile arranged on the ^2nd mobile M2 could also be suitable for the implementation of the desired clutch mechanism.

The advantage of the preferred embodiment illustrated is that the manufacturing mode of the drive elements, flexible or not, can be achieved by stamping and thus results in significant cost savings.

In the series of Figures 5 to 9 described in the following, will be described five essential indexing sequences within the preferred embodiment using the 1 ^st mobile M1 and the 2 ^nd mobile M2 illustrated in Figures 1A and 1B , as well as the programming mechanism for each of these ten-segment mobiles. These series of figures are intended to make it possible to see the relative angular positions of the two mobiles with respect to each other, as well as the positions of the mutual clutch elements, constituting here as driving and abutment elements, that is to say the first lamella L1 vis-à-vis each of the pins T1, T2, T3 and respectively the second lamella L2 vis-à-vis each of the notches E1, E2, E3 relative to each other. To facilitate the understanding of the reader, the indications ¹ mobile M1 are represented by solid character to distinguish them from those of the ^2nd mobile M2.

Each of the Figures 5A , 6A , 7A , 8A and 9A , and respectively 5D, 6D, 7D, 8D and 9D show the date of the current displayed through a window practiced in a dial C, and which is formed here by a first window F1 for displaying the digit of the tens of d and a second window F2 for displaying the digit of the U units, respectively before and after an indexing step. The dates displayed through the window can theoretically correspond either to a first date Q1, when a first digit u1 is displayed using indications carried by the first mobile M1, or to a second date Q2, when the number of units is a second truncated u2 digit of the units of the first date M1, here "0" carried by the second mobile M2, but in what follows, for the sake of simplification all the calendars will be systematically displayed by a combination of a tens digit d carried by the 2 ^nd mobile M2 tens, and a number of units U carried by the mobile M1 ^1.

The series of Figures 5A-F illustrates a first indexing sequence for date values whose units are between 2 and 9, ie a total of 7 indexations for the passages: 2-3, 3-4, 4-5, 5-6, 6-7, 7-8 and 8-9. This sequence of indexings is repeated 3 times on a monthly cycle, with the number of units " d " which can be equal to 0, 1 or 2. Figure 5A illustrates the date "02" displayed through a window of the dial C, before indexing, and the Figures 5A and 5B respectively and the relative positions of the first and second mobiles M1, M2, seen from above and from below. In this position, the driving wheel R of 24 hours is opposite the first toothed sector a21 of the second toothing D2 of the second mobile, visible on the Figure 5B , which is thus not rotated, while the first set of teeth D1 of the first mobile M1 comprises a tooth to be driven by the driving wheel R for each of the dates from 2 to 8.

On the Figure 5B , we see that the second lamella L2 is at the window, and on the Figure 5C it can be seen that this second lamella is engaged with the first notch E1. At each indexing of the first sequence, the ^1st mobile M1 rotates in the direction of rotation indicated by the arrows on the visible Figures 5B and 5C and the orientation of the ^2nd strip L2 and that of each of the notches, that is to say the first notch E1, E2 the second notch, and the ^3rd E3 notch allows the mobile M1 ¹ to slide on this ^2nd elastic lamella L2. As can be seen from the Figures 5E and 5F which represent the same views as the Figures 5B and 5C after passing the 3 ^rd day of the month, ^2nd L2 lamina remained in the same position, such that the entrainment wheel R of 24 hours thus always face of the first toothless a21 sector of the second set of teeth D2 of the second mobile, while the ^1st mobile M1 is shifted by one display segment, so that the lamella 2 ^nd L2 is no longer engaged with any notches. At the end of this first sequence of indexing, that is to say for the 9 ^th day of the month, ^2nd L2 louver is engaged either with the 1 ^st slot E1 but with the 3 ^rd slot E2 at the end of the first cycle of the 1 ^st sequence of indexing, and it will be understood that the relative position of the first and second mobile M1, M2 transferred from one outlet of the ^2nd strip L2 in the ^2nd slot E2 for 12 ^e date to one taken in ^3rd notch E3 for the ^19th calendar, and a plug of the ^3rd notch E3 for the ^22nd calendar at a shifted position of a display segment relative to the notch 1 ^st - such as the figure 5F - 29 ^th calendar, which will last indexation of the ^5th sequence of the 31 ^th calendar the ^1st of the following month explained using the sequence of Figures 9A-F described below.

During this 1 ^st sequence of indexing, the fixed gear sector K of the plate P has not been used, it will be precisely the 2 ^nd next indexing sequence illustrated by the Figures 6A-G in collaboration with the first lamina L1 integral with the mobile M1 ^1.

The Figures 6A and 6D illustrate the passage of the ^9th to the ^10th calendar day of the month, and generally aim to explain the operation of a ^2nd indexing sequence for the shift to a higher multiple, that is to say in the ^{9th 10th} of the month, and the 19 ^th to 20 ^th, and 29 ^th to 30 ^th. In this ^2nd indexing sequence, the two mobile rotate together because the mobile ¹ M1 drives the ^2nd mobile M2. As can be seen on the detail of the figure 6G , The ^era 1 L1 lamella is pushed outwardly in the active position by the fixed gear sector K of the holding plate P, that is to say the drive position referenced "PE" such that it entails, for the transition to the 1 ^st ten, ¹ tenon T1. It will be understood that a similar mechanism occurs clutch for the passage of each decade, with the same K gear sector, but which respectively push the lamella 1 L1 ^era PE drive position to the ^2nd T2 tenon to pass the ^19th to ^20th calendar calendar, and to the 3 ^rd pin T3 to pass the ^29th to ^30th calendar calendar.

As can be seen on the Figure 6B ^2nd lamella L2 is always positioned opposite the window while the last unit in the one series of indications ^era I1 ¹ mobile M1 is now also facing the ^2nd window F2. As explained above, and as can be seen from the Figure 6C This ^2nd L2 strip is now positioned in the ^2nd slot E2. To overcome the presence of ¹ toothless sector of the ^2nd mobile M2, referenced a21, which is always located in front of the driving wheel R 24 hours, and does not cause and not the ^2nd mobile M2 in rotation while the 1 mobile M1 ^er himself is driven by means of a tooth on the first gear D1 gear (not numbered in this figure for clarity issues), the first clutch mechanism 120 of the 2 ^nd mobile M2 by ¹ mobile M1 through the tenon ¹ T1 driven by the one lamella ^era L1 can drive together in rotation the ^2nd mobile M2 and ¹ mobile M1 of a display segment in the direction of rotation indicated on the Figures 6B and 6C . We can indeed see on Figures 6E and 6F the ^2nd strip L2 is always facing the ^2nd slot E2, but it is offset from a display segment (down on the figure 6E which is a view from above, and up on the figure 6F which is a view from below).

The 3 ^rd sequence illustrated by the series of Figures 7A to 7F shows passage of the ^10th of the month to the ^11th of the month, and more generally aims to explain the indexing of a day ending in "0" to a calendar ending in the number "1" or the passages of the ^10th to ^11th day of the month, the ^20th to ^21st of the month, and the 30 ^th to 31 ^th day of the month. According to the preferred embodiment described, the drive mode of the ^1st and the ^2nd mobile M1, M2 is very simple, since the main set of teeth ^era 1 D1 1 ^st mobile M1 and the ^2nd main set of teeth D2 of the ^2nd mobile M2 each contain a tooth which meshes with the driving wheel R, so that the clutch mechanism according to the invention is not solicited. However it will be understood, as explained above, that according to an alternative embodiment not shown, one could expand the fixed gear sector K so that the lamina 1 L1 ^era is always urged outwardly into its drive position PE for always driving the ¹ pin T1, so that no tooth is necessary at the ^2nd main set of teeth D2 of the ^2nd mobile M2 so that the latter is driven, since it would in this case by clutch ¹ with the mobile M1, that is to say still according to the first clutch mechanism 120 used in the 2 ^nd indexing sequence described above in connection with the series of figures. Furthermore, since the second L2 strip is always positioned in the ^2nd slot E2 in this position, one could remove a tooth of the one main tooth ^era D1 at this point and ¹ mobile M1 is driven in this case by the 2 ^nd mobile M2. A similar reasoning is valid for the passage of dates 20-21 where 1 L1 lamella ^era could possibly still cause the ^2nd pin T2, or alternately ^2nd lamella L2 could possibly still cause the mobile M1 ¹ through ^3rd notch E3; for the passage of 30-31 calendars, it would nevertheless be only one of L1 lamella ^era that could still cause the ^3rd pin T3, but no alternative is possible with the ^2nd strip L2 to drive the mobile M1 ¹ because it will be located offset from a gear sector or a segment display respectively from the first notch E1, as in the 5 ^th sequence, illustrated by the series of Figures 9A-F explained below. For these alternative embodiments not illustrated, it is understood that the 1 ^st and 2 ^nd auxiliary teeth D1 'and D2' will be adjusted depending on the profile of the 1 ^st and 2 ^nd main teeth D1 and D2 changed. The Figures 7B and 7C show respectively a top view and from below, the relative positions of the ^1st and the ^2nd mobile M1 and M2, with the direction of rotation of the two movable which rotate simultaneously during indexing. The Figures 7E and 7D indicate the indexed position of an additional display segment each of the two mobile M1, M2, with the ^2nd strip L2 which is still in engagement with the ^2nd notch but now two display segments formed below the window by the 1 ^st F1 display and ^2nd display window F2. For the passage of the 20 ^th to 21 ^th calendar, the angular position of the first mobile M1 would be unchanged, but the ^2nd strip of the ^2nd mobile M2 would be positioned approximately 3 o'clock on the dial, and in the ^3rd notch E3, as if on the figure 7F Only ^2nd lamella L2 had been moved to position in the ^3rd notch E3. For the passage of the 30 ^th to 31 ^th calendar, the position of ^1st mobile would be identical M1 to that of Figures 7B / 7C before indexing and 7E / 7F after indexation, and the position of the ^2nd mobile M2 is the same as it occupies on Figures 9B and 9C .

The fourth indexing sequence illustrated by the Figures 8A-8F is the indexing of dates whose units end in "1" to the calendars whose units end in "2" or passages from ^1st to ^2nd of the month and the ^11th to the ^12th, and 21 ^e to 22 ^e. For these calendars on ¹ mobile M1 is positioned such that the one toothing ^era D1 has a main toothless sector a1, registered in the Figure 8B To allow training of the ^2nd mobile M2 at end of month - ie for the calendar "31" which also ends with a "1" - without ¹ mobile M1, which is the object of the 5 ^th sequence illustrated by the Figures 9A-9F following, and which is in fact a special case of ^4th sequence described below.

For the ^11th of the month, the ^2nd strip L2 of the ^2nd mobile M2 is engaged in the ^2nd slot E2 1 ^st mobile, so that even in the absence of the tooth on one main tooth ^era D1 ¹ mobile M1, the latter is driven in rotation by the second mobile M2, driven by the driving wheel R 24 hours of a further display segment in the direction of rotation indicated by the arrows in Figures 8B and 8C . The relative position of the two mobiles therefore remains unchanged between Figures 8B / C and 8E / F, since each mobile has been rotated such that the number of units U equal to "2" is displayed in the ^2nd window F2 of the window, while the ^2nd strip L2 is superimposed on the display segment number of the units U equal to "9" of the 1 ^st directions ¹ mobile M1, substantially at 6 o'clock on the dial. This sequence is repeated as all prior to indexing sequences, three times each month, the only thing that changes for indexing the ^1st to ^2nd of the month from illustrations from the series Figures 8A-8F is the positioning of the 2 ^nd L2 lamina in engagement with the one notch E1 ^era instead of the 2 ^nd slot E2, with a positioning ^2nd L2 lamella from an angular position of about 10 o'clock on the dial at about 9 o'clock on the dial, next to the wicket, at the end of indexing, that is to say as on the Figures 5A / 5B the first indexing sequence described above, and on which the calendar mechanism will then chained during the course of the month. For indexing of the 21 ^st to 22 ^th day of the month, the ^2nd strip L2 will engage the ^3rd notch E3, and the angular position of the ^2nd strip L2 will change from a substantially placement to 3 hours on the dial, at a position at 2 o'clock on the dial.

At the end of each of these three possible indexing for this 4 ^th index sequence, it is noted that the driving wheel R changes from a display segment where the first main set of teeth D1 of the first mobile M1 is provided with a sector main edent a1, to a next display segment where the second main gear D2 is in turn provided with a toothless sector, namely: the first edentulous sector referenced a21 for the 2 ^nd calendar of the month (see Figure 5B ), the 2 ^nd edentulous sector referenced a22 on the figure 8E for the 12 of the month and finally the ^3rd toothless sector referenced a23 to the ^22nd of the month.

The series of Figures 9A-9F concerning the 5 ^th and last indexing sequence which, unlike the four indexing sequences previously described, is performed only once a month, unlike the other four previously described, which are performed 3 times each during each month. As explained previously in view of Figures 8A-F for the 4 ^th index sequence, the 5 ^th index sequence is a particular case of the 4 ^th index sequence in the particular case where the ^2nd mobile M2 is driven only by one tooth of the toothing 2 ^e main D2, while the absence of tooth at the level of the first main dentition D1 - main edentulous sector referenced a1 on the Figure 9B - and no clutch mechanism between the ^2nd and 1 ^st mobile display that the ^2nd mobile M2 rotates alone without ¹ mobile M1.

As can be seen by comparing the Figures 9A and 9D Respectively showing the directions before and after indexing the ^31st to ¹ calendar day of the following month, the angular position of the 1 ^st mobile M1, seen in Figures 9B and 9C , does not move during indexing and ends up on Figures 9E and 9F . We therefore find the same edentulous sector - that is to say, the main edentulous sector, referenced a1 - on the Figure 9E that on the Figure 9B . As can be seen from the Figure 9C This is because the relative angular position of the first mobile M1 with respect to the 2 ^nd mobile M2 is such that the ^2nd strip L2 is not engaged in the 1 ^st slot E1, so that no drive mutual clutch is only possible. ^2nd lamella L2 will however again cause the 1 ^st mobile M1 through the first notch E1 after the ^2nd mobile M2 will be turned and can well check the mutual engagement of the figure 9F after 5 ^th index sequence, which in turn will be followed by an index corresponding to the 4 ^th index sequence described in the preceding paragraphs for the passage ¹ of the month in the 2 ^nd day of the month.

Once this indexing performed a complete display cycle is performed and the angular position of the two mobiles is identical with respect to the window, that the ^2nd lamella secured to the 2 ^nd mobile M2 and the number of units U value " 2 "are located substantially at 10 o'clock on the dial, that is to say the angular segment just above that corresponding to the display window formed by the 1 ^st and 2 ^nd window F1 and F2, located to each other at 9 o'clock on the dial.

It will be understood from the foregoing that other display alternatives for the proposed large date type display device are possible, in particular with a display using indications whose characters are tangentially oriented and no longer radially oriented. each of the mobiles, in contrast to the preferred embodiments described. In this case, no more recess V ¹ mobile M1 or spaces on the ^2nd mobile M2 would be necessary to juxtapose the display indications, the latter can never be superimposed on each other because they evolve along geometrically separate annular spaces, formed for example of two concentric rings of different lower radii, or concentric display mobiles formed of a disk and a ring, or even two non-concentric mobiles whose series of indications overlap partially in a window, without ever being superimposed, for the display of the date. Other display variants using other programming and clutch mechanisms between the two mobile displays are also possible, especially with pivoting retractable teeth radially meshing and not vertically.

Claims (9)

1. Device for displaying a large date for watch movement comprising a first mobile (M1) for displaying units and a second mobile (M2) for displaying tens, with said first and second mobiles (M1, M2) being arranged to display the values of the date using a combination of indications borne by said first mobile (M1) and of indications borne by said second mobile (M2),
   said first mobile (M1) bearing a first series of indications (11) of consecutive unit figures (u) on ten first display segments (S10-S19) evenly distributed over angular sectors of said first mobile (M1), and
   said second mobile (M2) bearing a second series of indications (12) for the display of tens digits (d) of said date on ten second display segments (S20-S29) evenly distributed over angular sectors of said second mobile (M2), characterised in that the second series of indications (12) of said 2^nd mobile (M2) is made of two consecutive indications for displaying the tens digit "0", followed by three consecutive indications for displaying the tens digit "1 ", then three consecutive indications for displaying the tens digit "2", and finally two consecutive indications for displaying the tens digit "3".
2. Device for displaying a large date according to the preceding claim, wherein
   said 1^st and 2^nd mobile (M1, M2) are formed by superimposed and concentric annular elements.
3. Device for displaying a large date calendar type according to one of the preceding claims, wherein each first display segment (S10, S11, S12, S13, S14, S15, S16, S17, S18, S19) is associated with the juxtaposition of a recess (V) followed by a 1^st unit figure (u1) or a space, and wherein each second display segment (S20, S21, S22, S23, S24, S25, S26, S27, S28, S29) is associated with the juxtaposition of a tens digit (d) followed by a 1^st space (V0), a 2^nd space (V1), a 2^nd space (V2) or a 2^nd unit figure (u2) the sizes of said recess (V) of said 1^st mobile (M1), of said 1^st, 2^nd and 3^rd spaces (V0, V1, V2) of said 2^nd mobile (M2), and of said tens digit (d), of said 1^st unit figure (u1) and of said 2^nd unit figure (u2) being all identical.
4. Device for displaying a large date according to one of the preceding claims, characterised in that it comprises a drive wheel (R) of 24 hours, kinematically connected to said 1^st mobile (M1) through a first main kinematic chain (C1), and kinematically connected to said 2^nd mobile (M2) through a second main kinematic chain (C2), each one of said first and second main kinematic chains (C1, C2) comprising a gearing mobile each provided respectively with ten gearing sectors associated respectively with said first display segments (S10-S19) and with said second display segments (S20-S29).
5. Device for displaying a large date according to claim 4, characterised in that each one of the first and second mobile (M1, M2) respectively has a first and a second main tooth gear (D1, D2) for daily gearing, meshing respectively in a first main meshing plane (P1) and in a separate second main meshing plane (P2), said first and a second main tooth gear (D1, D2) for daily gearing each being provided with ten gearing segments that are mutually superimposed on one another, and meshing directly with a drive wheel (R) of 24 hours selectively according to the date.
6. Device for displaying a large date according to claim 5, characterised in that said first main tooth gear (D1) of said first mobile (M1) comprises at least one main toothless sector (a1) and that the 2^nd main tooth gear (D2) of said 2^nd mobile (M2) comprises a first series of non-consecutive toothless sectors (A2) made of at least one first toothless sector (a21), a second toothless sector (a22), and a third toothless sector (a23).
7. Device for displaying a large date calendar according to claim 5 or 6, characterised in that each one of the 1^st and 2^nd mobiles (M1, M2) further has respectively a first and a second auxiliary tooth gear (D1', D2') for correction, arranged respectively in a third and a fourth meshing plane (P1', P2') separate from the first and second meshing planes (P1, P2) of said first and second main tooth gears (D1, D2).
8. Device for displaying a large date according to one of the preceding claims, characterised in that it further comprises a two-directional clutch system for driving said 2^nd mobile (M2) by said 1^st mobile (M1) at least on certain dates, and driving said 1^st mobile (M1) by said 2^nd mobile (M2) at least on certain other dates.
9. Device for displaying a large date according to claim 7, characterised in that
   said 1^st mobile (M1) is made of an annular element rotating around a support plate (P), characterised in that a driving element of the 2^nd mobile (M2) is arranged on said 1^st mobile (M1), and that a fixed meshing sector (K) is arranged on said support plate (P), with said driving element of the 2^nd mobile (M2) cooperating, at least on certain dates, with said fixed meshing sector (K) in order to drive said 2^nd mobile (M2).

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