EP1760555A1 - Winding and time setting mechanism for a watch - Google Patents

Abstract

The mechanism has a pinion presenting a non-circular axial opening mounted on a complementary sectional portion of a winding and setting stem (9) and engaged with a winding crown located at a dial side. The crown is coaxial with a bar (6) carrying two winding and timer setting wheels (5, 10) engaging with the crown. The bar is maintained in a rest position by a spring (12) and a lever (77) when the lever engages with the bar by a winding stem crown (78) during its axially screwed position on an element integrated to a case. A stop (13) limits a tilt angle of the bar.

Description

The present invention relates to a winding mechanism and time setting for a timepiece comprising a winding pinion engaged with a pull to limit its axial displacement to at least two positions, one of which allows the reassembly and the other the time setting.

Winding mechanisms of this type have been known for a long time. They comprise a sliding pinion slidably mounted on a portion of square section of the winding stem and which can be moved longitudinally by a rocker in mesh with the zipper controlled by the winding stem. Such a mechanism is perfectly suited to a timepiece provided with a barrel for the sole drive of the finishing train comprising a barrel ratchet located on the bridge side of the movement of the timepiece. By cons, in the case, especially where the cylinder is of a particular type, the winding integral with the barrel shaft which is attached to the inner end of the barrel spring is not necessarily the side bridges, but may have to be located on the dial side, so that the usual winding and setting mechanism may not be suitable.

The object of the present invention is to allow to adapt the winding mechanism and time setting to a clockwork mechanism whose movable winding of the barrel is located on the dial side.

For this purpose, the present invention relates to a winding and setting mechanism according to claim 1.

The mechanism which is the subject of the present invention satisfies the desired objective in a simple manner and without losing the advantages well-known operation of the traditional winding-gable winding and setting mechanism.

The accompanying drawing illustrates, schematically and by way of example, an embodiment of a timepiece with a large ring with minute repetition, object of the present invention.

Figure 1 is a simplified plan view on the dial side of this timepiece;

Figure 2 is a simplified plan view of this bridge-side timepiece;

FIG. 3 is a bridge side view of the time and ring counting wheels;

Figure 4 is the same view as Figure 3, side view;

Figure 5 is a perspective view, side view of the barrel and the first two wheels of each of the wheels of Figures 3 and 4;

Figure 6 is a view of the same elements as in Figure 5, seen dial side;

Figure 7 is a diametrical sectional view of the barrel of Figures 3-6;

Figure 8 is a partial view of Figure 1, showing the barrel and gear wheel power reserve indicator;

Figure 9 is an elevational view of Figure 8;

Fig. 10 is a plan view of the power reserve indicator gear train of the ring gear;

Fig. 11 is a plan view of the power reserve indicator gear train of the time counting train;

Figure 12 is a partial sectional view along the line XII-XII of Figure 8;

Figure 13 is a detail view of the winding mechanism and setting time in the time setting position of the timepiece;

Figure 14 is the same view as Figure 13, the mechanism being in the winding position;

Figure 15 is the same view as Figure 13, the mechanism being in the rest position;

Fig. 16 is a partial plan view of Fig. 1 showing a ring mode selector device;

Fig. 17 is a partial plan view of Fig. 2 showing the striking mechanism and a safety lock mechanism associated therewith;

Fig. 18 is a partial plan view of Fig. 17, showing the striking mechanism of the bell in two other positions;

FIG. 19 is a partial plan view of FIG. 2 of the hammer driving mechanism of the hours;

Figure 20 is a partially sectional view along the line XX-XX of Figure 19;

Figure 21 is a partial perspective view of Figure 2;

Fig. 22 is another partial perspective view of Fig. 2 on which the balance bridge is added;

Fig. 23 is a detail perspective view of a ringer lock mechanism;

Figures 23a, 23b are partial views of Figure 23 in two positions of the locking device;

Fig. 24 is a detail perspective view of a braking mechanism of the ringing wheel in a first position;

Figure 25 is a view similar to Figure 24 in a second position of the steering wheel brake mechanism.

A peculiarity of the great-time mechanism for a timepiece according to the present invention lies in the fact that it is situated on both sides of the movement of the watch, illustrated respectively by FIGS. 1 and 2. For the sake of clarity, only the necessary organs for the understanding of the invention have been shown. Thus, the bridges, the milling of the plate and the organs of the timepiece itself have not been represented, with the exception of the barrel 1 of the mainspring, to the extent that the same barrel 1 serves to drive the gear of the timepiece 2, called the finishing train and the ring gear 3, as shown in Figures 3 and 4.

As illustrated by FIGS. 1, 4, 7, 13 and 14, the shaft of the barrel 1 is integral with a winding mechanism 4 which, unlike the traditional ratchet, is not associated with a ratchet and can therefore rotate in both ways. This winding mobile 4 is intended to come into selective engagement with a winder 5 pivotally mounted on a rocker 6, itself pivoting about the pivot axis of a winding crown 7 in engagement with a winding pinion 8 flip-flop of the winding and setting-up rod 9. The flip-flop 6 still carries two references 10. A time setting lever 14 is engaged with a groove of the winding and setting rod. 9. This pull tab 14 has a pin 14a intended to engage with a surface 6a of the rocker 6 in the setting position of the winding stem 9 (FIG. 13), to set the timer return 10 engaged with the timer wheel 11 of the usual timer train (not shown).

The winding and setting rod 9 is associated with a winding stem crown 78 to be screwed onto a member (not shown) integral with the housing for protecting the clockwork mechanism. This type of case with Screwed crown winding crown is well known to those skilled in the art and is used to improve the sealing of the housing to the passage of the winding stem. It does not form part of the present invention and therefore does not need to be described to understand the invention. It is sufficient to know that to allow the screwing of the winding stem crown 78, it must be associated with the winding stem 9 so as to be disengaged from this rod 9. This is the reason why the crown of the winding stem (not shown) comprises, in known manner, a tubular portion which has at its end a portion of polygonal section which, in the unscrewed position of the crown of the winding stem is engaged with a polygonal portion complementary section (not shown) of the winding stem 9 by a spring (not shown) exerting an axial force tending to move the crown of the winding stem 9, so that when the winding stem crown 78 is unscrewed, the two polygonal clutch parts 78a, 9a are engaged, which makes it possible to drive the winding stem 9 in rotation about its longitudinal axis and to carry out the winding of the mainspring or the setting time according to the axial position in which this winding stem 9 is put.

A tubular element 78 is freely disposed around the winding stem 9, between the tube of the winding stem crown (not shown) and the lever 77.

When the winding and setting rod 9 is in the axial position illustrated in FIG. 15, pushed back towards the winding pinion 8 and the winding stem crown 78 is in its screwed axial position, in which the two polygonal parts of the winding stem, respectively of the crown winding stem (not shown) are disengaged, the tubular element 78 is pressed against the lever 77 by the tube of the winding stem crown (not shown). The opposing forces that the spring 12, on the one hand and the lever 77, on the other hand exert on the rocker 6 maintain the returns 5 and 10 released from the winding device 4, respectively from the timer wheel 11.

When the winding stem crown 78 is in the unscrewed position (FIG. 14), the spring 12 can not put the ratchet gear 5 in engagement with the winding gear 4 because the stop 13 limits its radius of action. On the other hand, as soon as a torque is exerted on the winding stem 9 in a clockwise direction, the winding pinion 8 rotates the winding crown 8 in the opposite direction to that of the hands of a watch . This rotation is transmitted to the winder return 5 which, by reaction on the rocker 6 which carries it, exerts on it a counterclockwise torque, thereby engaging the winding return 5 with 4. When the winding and setting rod 9 is pulled in the position shown in FIG. 13, the pin 14a of the pull tab 14 engages the plate 6a of the lever 6, engaging the timer return 6 with the timer wheel 11.

To drive the finishing gear 2 and the ring gear 3, the barrel 1 (FIGS. 5-7) comprises, as usual, a drum provided with a set of teeth 1a in engagement with the high gear of the finishing gear 2. against, unlike a conventional barrel, its lid is pivotally mounted relative to the drum and it carries a toothing 1b engaged with the pinion of the first mobile of the ring gear gear 3.

The toothed lid 1b of the barrel 1 is pivotally mounted on a cylindrical portion 1c of the shaft 1d (FIG. 7) of this barrel 1. This toothed lid 1b is connected to a portion of square section 1e of the barrel shaft 1d by a ratchet drive wheel 15 housed in the thickness of the toothed lid 1b, integral with the barrel shaft through at the square section portion 1c and whose ratchet gear is engaged with two pawls 16 (FIG. 5), pressed in this ratchet toothing by two leaf springs 17a secured to a resilient split ring 17 resiliently fixed in a circular housing formed in the thickness of the toothed lid 1b. During the winding of the spring housed in the barrel 1, with reference to FIG. 5, the barrel shaft 1d rotates in the clockwise direction. Therefore, the ratchet wheel 15 rotates causing the pawls 16 to detach. When the spring of the barrel 1 is cocked, it is on the one hand the escapement 2a associated with the balance-sprung regulator system (not shown). ), on the other hand a locking lever 18, comprising a brake 18b (Figures 1 and 4) for stopping a flywheel 19 of the ring gear 3 which generally control the disarming of the spring barrel 1.

The barrel 1 is again associated with a gear train 20 for the indication of the power reserve (FIGS. 1, 8-12) of the spring of the barrel 1. Given the fact that the spring of the barrel 1 can disarm also well by its outer end, secured to the barrel of the barrel 1 by driving the work train 2 by its toothing 1a, that by its inner end, integral with the barrel shaft 1d by driving the ring gear 3 by its toothing 1b, it is necessary for the gear train 20 to be able to add the angular displacements of the teeth 1a, 1b and to subtract the angular displacement of the shaft 1d of the barrel consecutive to the winding of the spring of the barrel 1.

For this purpose, a first pinion 21 is mounted on the same portion of square section 1g of the barrel shaft 1d as that receiving the winding ratchet 4. A second pinion 22, coaxial with the first 21 is integral with the cylindrical hub 1f of the barrel drum provided with teeth 1a. The first gear 21 meshes with a first wheel 23, while the second gear 22 meshes, via a gear 24, with a second wheel 25, coaxial with the first wheel 23, so that the two wheels 23 and 25 both turn counterclockwise (Figure 10, 11) when the spring disarms, even if the pinions 21, 22 rotate in opposite directions from one another. By cons, when the winding ratchet 4 rotates the barrel shaft 1d in the opposite direction to that of the clockwise during the winding of the spring barrel 1, the wheel 23 is then driven in the direction of Clockwise.

The wheel 25 is pivotally mounted on a frame member B (Figure 12). Between this wheel 25 and the wheel 23, a free wheel 26 is mounted, coaxial with the other two. This free wheel 26 has five openings in each of which a ball 27 is freely mounted. This free wheel 26 also serves as a ball cage. It is mounted on a cylindrical part of a nut 29 (FIG. 12) and is held between a bearing surface of this nut 29 and a bearing surface of a screw 30 screwed into the nut 29. The diameter of the balls 27 is greater than the thickness of the free wheel 26, so that these balls can protrude from both sides of the free wheel 26. The wheel 23 is pivotally mounted in an opening of an elastic arm 28 secured to the frame B of the watch. The pressure exerted by this elastic arm 28 on the wheel 23 serves to allow the wheels 23 and 25 to drive the balls 27 and consequently the freewheel-shaped ball cage 26.

This device allows the free wheel 26 to total or subtract the simultaneous angular displacements of the wheels 23, 25 as they rotate in the same direction or in opposite directions relative to each other. Then the rotation of the freewheel 26 is transmitted to two mobile 31, 32 of the power reserve gear train, and to a toothed sector 33 (Figure 1) of the mobile power reserve indicator, intended to carry a needle 33a disposed opposite a graduation (not shown) carried by the dial of the timepiece.

We will now describe the striking mechanism itself. Like all mechanisms of this type, it has three cams called snails in this type of mechanism; the hour snail 34, the quarter snail 35 and the minute snail 36 (Figure 2). These snails 34-36 are driven in known manner by the time wheel of the timepiece. This training of snails, moreover known, is not necessary for the understanding of the present invention, so that it is not described here. It is sufficient to know that the snail of the hours 34 is driven at a rate of 1 turn in 12 hours, as the hour hand of the timepiece, while the quarter and minute snails 35, 36 are driven as minute hand, at the rate of 1 turn per hour.

Each snail 34-36 is associated with a ring rake, namely, respectively, the rake hours 37, the rake quarters 38 and rake minute 39. By cons and unlike mechanisms of this type, the three rakes 37 -39 are here rotated at the geometric center of the watch movement. Each of these rakes 37-39 is subjected to the force of a return spring 40, 41, respectively 42 (Figure 2), which tends to rotate in the direction of the clockwise. The return spring 40 acts on a latch 43 locking the winding stem which will explain the function thereafter. This flip-flop 43 has a toothed sector 43a engaged with a toothed sector 37b of the hour rake 37 (FIG. 19).

The pivoting of these rakes in the center of the movement makes it possible to give the respective toothed sectors 37a, 38a, 39a ratchet toothings of these rakes 37-39 for the actuation of the lifts (not shown because they are well known) of the ringer hammers. , 76 (Figure 1) the largest possible radii with respect to the movement of the timepiece. Consequently, the steps of the respective ratchet teeth 37a, 38a, 39a of these rakes 37-39 intended to cause these ringer lifts are as long as possible for the size of the watch movement considered. This is particularly important when this watch movement is that of a wristwatch, necessarily smaller than that of a pocket watch.

The mechanism for driving the ring rakes 37-39 when the bell is triggered is illustrated in FIGS. 19 and 20. It comprises, on the axis of the second mobile 3b of the ring gear 3, a free pinion 44 engaged with a toothed sector 37c formed along the inner edge of the hour rake 37. A second pinion 45, identical to the free wheel 44, is mounted on a square section portion of the axis of the second ringing mobile 3b. A clutch rocker 46 pivoted about an axis 46a carries a clutch gear 47 whose thickness corresponds substantially to that of the two pinions 44 and 45, so that when this clutch gear 47 is engaged with these gables 44, 45, it secures the hour rake 37 with the striking gear 3.

The triggering mechanism will be described in more detail later. However, the operation of rakes 37-39 can be explained here. The pinion 47 of the clutch rocker 46 is held in engagement with the free gear 44 by an arm of a trip lever 48 of the ring, engaged with a roller 46b of the clutch rocker 46, as illustrated by the position of the lever 48 drawn in solid lines In FIG. 19, upon release, the lever 48 is moved into the position shown in broken lines in FIG. 19, which frees the idle gear 44 in engagement with the teeth 37c of the hour rake 37. spring 40 can rotate hour rake 37 clockwise until its feeler 37d abuts against one of the rungs of snail of hours 34. Hour rake 37 starts rotation in the direction of the hours. clockwise, at the same time as the quarter rake 38 and minute rake 39. By its rotation, this rake 39 moves its cam 39b in which one end 81a of the blocking rocker 81 is engaged, thereby toppling this blocking rocker 81 clockwise about its pivot axis 81c, from the position shown in FIG. 24 to that shown in FIG. 25. Since the other end of this latch is engaged with the opening 18c of the locking lever 18 of the steering wheel 19, it pivots the locking lever 18 in the direction of clockwise, thus removing the brake 18b of the steering wheel 19 of the ring gear, releasing the gear The locking lever 18 is on the side of the clockwork movement opposite to that on which the ring rakes are located, so that the blocking rocker 81 passes through the clockwork to engage with the cam 39b of the timer rake 39 (Figures 1 and 2) which is on the other side of the movement.

We will now explain how the trigger lever 48 is controlled, with particular reference to FIGS. 2, 17 and 18, the latter two showing essentially the entire trigger mechanism actuated by the clockwork mechanism, as well as the manual triggering device, in the different positions corresponding to the different functions. The triggering mechanism comprises a quarter star 49 fixed on the same mobile of the timepiece as the quarters quarter and minute 36 snail, so that it is driven at a rate of turn per hour. A rocker 50 subjected to the pressure of a return spring 51 comprises an arm whose end intersects the trajectory of the teeth of the quarter star 49 which rotates in the opposite direction of that of clockwise.

At the end of the other arm of this rocker 50, a pusher 52 is articulated by means of a toggle joint 53. This pusher 52 also comprises a spring 52a which rests on an eccentric 54 secured to the frame and a arm 52b whose role will be explained later. The pusher 52 is intended to push a lever 55 maintained resiliently applied by a return spring 56 against an eccentric stop 57. An end 55a of an elastic arm 55c of this lever 55 carries a pin engaged in a slide 48a provided to the end of a second arm of the trip lever 48.

As can be seen by referring to the firing position partially drawn in broken lines in FIG. 17, when a tooth of the quarter star 49 meets the end of the free arm of the latch 50, it rotates it in the clockwise direction, to bring it into the position drawn in solid lines in Figure 17, moving the pusher 52 to the left to bring its end nose in front of the nose 55b of the lever 55. During this displacement, the free end of the pusher 52 meets the end 55b of the intermediate lever 55 and passes over it by turning slightly in the direction of clockwise around the toggle 53 and against the restoring force of the spring 52a. As soon as the tooth of the quarter star 49 releases the arm of the rocker 50 with which it is engaged, the return spring 51 tilts the rocker 50 in its position shown in FIG. 2. During this tilting, the The pusher is moved into the firing position shown in phantom in FIG. 17, by pivoting the lever 55, whose end 55a then moves the trigger lever 48 to its position shown in phantom, in which position it releases the clutch rocker 46 to drop the ring rakes 37-39 against respective snails 34-36, as previously explained.

When the pusher 52 reaches the end of its stroke, it releases the nozzle 55b of the lever 55, allowing the return spring 56 to bring it against the stop 57. Therefore, the trigger lever 48 returns to its drawn position in continuous line in FIG. 17, bringing back into engagement the free pinion 44, meshing with the teeth 37c of the rake of the hours, with the wheel 3b of the ring gear 3. However, as explained above, the fall of the rakes 37-39 had the effect that the cam 39b minute rake 39 has pivoted the locking lever 18 of the steering wheel 19 of the ring gear, thus releasing this steering wheel 19 and thus the entire ring gear 3 which can be driven by the spring of the barrel 1. Therefore, this rotation of the ring gear is transmitted to the hour rake 37 by the pinions 44, 45 secured to one another by the clutch gear 47 of the latch. clutch 46, causing the driving of the rake ures 37 in the opposite direction of that of the clockwise. When the hour rake 37 arrives at the end of the hour bell, a pin 37e engaged with an arcuate opening 38c of the quarter rake 38 (FIG. the latter, which in turn causes the minute rake via a pawl 58 (Figure 22) biased by a spring 59 which is engaged with a ratchet 39c minute rake 39, as soon as this ratchet 58 leaves a fixed stop 60 secured to the balance bridge, after the ringing of the last quarter of an hour. The stopping of the ringing is produced by the blocking of the steering wheel 19 by the brake 18b, as soon as the end 81a (FIG. 24) of the locking lever 81 arrives at the end of the cam 39b of the minute rake 39 and causes, by its swinging in the opposite direction to that of the clockwise, a slight pivoting of the locking lever 18 to move it from the position shown in Figure 25 to that shown in Figure 24 and therefore causes the application of its brake 18b against the steering wheel 19 and the stop of the ring gear.

A ringing arresting cam 61 (FIGS. 1 and 23) is keyed to the last mobile 32 of the power reserve indicator train. The angular position of this cam 61 is chosen so as to block the clutch rocker 46 from the moment when the power reserve of the spring of the barrel 1 reaches a running time of the movement of the timepiece fixed to a certain value, for example 24 hours. This cam 61 is in desmodromic connection with the shaft and the drum of the common cylinder (1) with an angular ratio chosen so that its total displacement angle corresponding to the total winding angle of the mainspring does not exceed 360 ° . This cam 61 is intended to move a locking lever 79 pivoting about an axis 79d, between two positions, an unlocking position shown in solid lines in FIGS. 23 and 23a and a locking position shown in broken lines in FIG. 23 and in Figure 23b. The lever has two projections 79a, 79b. When the cam 61 turns in the direction of clockwise corresponding disassembly of the barrel spring, its projection 61a meets the projection 79a of the locking lever 79 and rotates clockwise. This locking lever 79 is integral with a return spring 79c which bears against the plate (FIG. 1), so that this return spring determines the two positions of the locking lever 79.

This locking lever 79 has an opening 79e in which is engaged play with one end of a latch 80 pivoting about an axis 80a oriented perpendicular to the pivot axis 70d of the locking lever 79. This rocker 80 has a locking flat surface 80b, which in its locking position shown in dashed lines in FIG. 23 and in continuous line in FIG. 23b, is in the path of an arm 46c of the clutch rocker. 46.

Thus, when the release lever 48 releases the clutch rocker 46 and the projection 61a of the cam 61 has moved the locking lever 79 in its position shown in dashed lines in Figure 23 and in solid line in Figure 23b , the clutch rocker 46 is locked, the pinion 47 remaining in engagement with the two pinions 44 and 45 as illustrated in Figure 20, so that the ring rakes 37-39 remain blocked. When the spring of the barrel 1 is reset, the projection 61a of the cam 61 rotates in the opposite direction to that of clockwise. During its rotation, it meets the projection 79b of the locking lever 79, pivoting the lever 79 in the direction of clockwise. This rotation of the locking lever 79 moves latch latch 80 counterclockwise about its pivot axis 80a, thereby releasing clutch lever 46.

The mechanism for triggering the striking, illustrated in FIG. 17 and described above, is still connected to a mechanism for triggering this buzzer on demand, which comprises a manual control lever 62 hinged about an axis 62a and whose the tilting is controlled by a pusher 63 acting at one of its ends. The other end of this manual control lever 62 is intended to act on a transmission lever 64 which has a slide 64a in which the pin 55a located at the end of the elastic arm 55c of the lever 55 is engaged. Therefore, if the trip lever 48 is actuated by the manual control rocker 62, between two quarters of hours where the ringing sounds according to the incidental ringing mode, this ringing will sound the time, the quarter (s) and minutes after the last quarter, provided that the bell is not disabled. We have seen a mode of neutralization of this ring, we will see others later.

For the moment, we are going to examine another part of the striking mechanism linked to the manual control lever 62 of the bell. It is known that it is absolutely necessary not to put the watch on time during the operation of the ring. Likewise, if you put the watch on time, the ringtone must not work. In both cases, the interference between the operation of these two mechanisms would have extremely damaging consequences for these mechanisms.

This is the reason why the manual control lever is associated with a blocking device. FIG. 17 shows this locking device when the winding stem 9 is in the winding position, corresponding to that of its two axial positions in which it is closest to the center of the movement of the timepiece, drawn in continuous line. . A groove 9a of this winding stem 9 is engaged, like a pull tab, with a latch 65 pivoting about an axis 65a. This latch 65 includes a pin 65b engaged with a return spring 66b secured to a locking cam 66 pivoting about an axis 66a. This locking cam 66 also includes a stopper 66c in the form of an ankle intended to cooperate with the locking lever of the winding stem 43, whose toothed sector 43a engages the toothed sector 37a of the hour rake 37.

In the position illustrated in Figure 17, the winding stem 9 is in the winding position. As can be seen, the manual ringer control lever 62 can be operated about its pivot axis 62a to trigger the ringer mechanism, since the locking cam 66 does not prevent an ankle 62b, which extends perpendicularly to the end of the lever 62 on which the pusher 63 acts, to move. Likewise, from this winding position, the time-setting rod 9 can be pulled axially towards the outside of the movement, in the setting position, since in the stopping position of the rake of At 37 hours, the latch 43 of the winding stem prevents the locking cam 66 from rotating while retaining its stop 66c. Thus, the winding stem 9 can be moved to its setting position shown in continuous lines in FIG. 18.

This displacement in this setting position causes the pivoting of the latch 65 whose pin 65b in turn causes that of the locking cam 66 against the pin 62b located at the actuating end of the lever. Manual control of the ring 62. Therefore, in this setting position of the winding stem 9, the control lever 62 is locked.

The second position illustrated in dashed lines in Figure 18 shows the winding stem 9 pushed towards the center of the movement of the timepiece, in the winding position. The latching latch 43 is moved counterclockwise, releasing the stop 66c, so that the return spring 66b of the latch cam 66 rotates it clockwise. of a watch about its pivot axis 66a, which has the effect of engaging the pin 65b of the latch 65 in a concave locking notch 66d of the locking cam 66, preventing axial displacement of the rod winding 9 outward movement of the timepiece, as the hour rake 37 has not returned to the off position, corresponding to the end of the ring, position in which the latch blocking 43 the winding stem 9 is brought back by the hour rake 37 in its position drawn in solid lines, corresponding to the stop of the ring.

The portion of the striking mechanism illustrated in Figure 16 relates to the selection of the ring mode selected from three possibilities: the big ring, ringing by passing the hours and quarters every quarter of an hour and more, during the actuation of the manual control lever 62 for striking between two quarters of hours, the minutes, the small bell ringing in passing only the quarters and in addition, when actuating the manual control lever 62 for ringing between two quarters hours, minutes and finally the silent mode, suppressing any ringing in passing.

This selection mechanism, illustrated in FIG. 16, comprises a circular cam 67 similar to a column wheel of a chronograph mechanism. This column wheel 67 is designed to pass successively from one of the three ring modes to the other in a determined succession, then to repeat the same cycle indefinitely exerting each time a pressure on a control pusher (not shown) accessible outside the watch case.

This column wheel 67 is driven in a counter-clockwise direction by an articulated ratchet 68a 68a controlled by a pusher (not shown) mounted on the watch case, acting in the direction of the arrow F in FIG. end of the rocker 68 opposite that to which the pawl 68a is hinged. A pawl spring 77 places this pawl 68a in engagement with a ratchet wheel 67a set on the column wheel 67 and constantly tends to hold the pawl 68a in an angular position relative to the ratchet wheel 67a corresponding to its position. resting position illustrated in FIG. 16. Successive pressures in the direction of the arrow F on the end of the rocker 68 opposite to that in which the pawl is hinged alternately with the release of this pressure make it possible to turn the column wheel 67 in successive steps.

A selector upper cam 67b is disposed above the four columns 67c, with which a pivoted selector rake 69 is engaged under the pressure of a return spring 70. This selector rake 69 meshes with a toothed sector. 69a with a pinion 71 of an indicator (not shown) for displaying the selected ringing mode.

Two levers 72, 73 cooperate with the columns 67c of this column wheel 67, a ring / silence control lever 72 and a large ring / small ring control lever 73. Each of these levers 72, 73 carries a control pin 72a. respectively 73a which both traverse the movement of the timepiece. The peg 72a is visible in FIGS. 2, 17 and 18 on which it is shown in solid lines in its ringing control position and in dashed lines in its silence control position of the ring triggering mechanism.

The operation of the trigger mechanism of FIGS. 17 and 18 in ring mode has already been described previously. When the control pin 72a of the control lever 72 is moved by the column wheel 67 in silent mode, it is in the position shown in phantom in FIG. 17, so that it pushes the arm 52b of the pusher trigger 52 to rotate it clockwise. Therefore, when triggering, the end of the pusher 52 passes next to the nozzle 55b of the lever 55 and no ringing trigger occurs. As can be seen, the selection in silent mode is only operative for the ringing mode said in passing, but not on the manually operated bell, since in this case, the manual control lever 62 acts directly on the lever trigger 48 by means of the transmission lever 64, so that the user always has the possibility to actuate the repetition, even in silent mode, unless the winding and setting rod 9 is in setting position, as explained above, or that the cam 61 locks the clutch lever 46 at the end of winding of the mainspring, to avoid causing the stoppage of the watch movement .

The pin 73a of the small and large control lever 73 is visible in the bridge side view of FIG. 2, as well as in FIGS. 17 and 18. This pin 73a is engaged in an elongate opening 74a of a rocker 74 The flip-flop 74 is capable of occupying two positions, one drawn in broken lines and corresponding to the great ring, the other drawn in continuous line and corresponding to the little ring. As seen, in this second position, the end 74b of the rocker 74 is placed in the trajectory of the latch 43 locking the winding stem which is in kinematic connection with the hour rake 37 by its toothed sector 43a engaged with the toothed sector 37b hour rake 37. Therefore, in this position, the rocker 43 can move only a limited angle.

This has the effect of only allowing the rake of the hours 37 to be moved by an angle sufficient to clear the rakes of the quarters 38 and minutes 39, allowing the quarter and minute ringer to sound, but not the hour ringer since the movement authorized by the retaining scale 74 is chosen so as to prevent the penetration of the probe 37d into the snail of the hours 34. During the ascent of the hour rake 37, since the fall of the rake 37, under the action the spring 40 acting on the latch 43, has been too limited for its toothing engages with the lifting operation (not shown) of the hours hammer, no time ring occurs.

Claims (3)

Winding and setting mechanism for a timepiece comprising a winding pinion (8) mounted on a winding stem (9) engaged on the one hand with a pull tab (14) to limit its axial displacement to at least two positions, one of reassembly and the other time setting and secondly with a winding stem crown that can be screwed to an element integral with the case of this timepiece, in the rest position of this mechanism, characterized in that said winding pinion (8) has a non-circular axial opening mounted on a portion of complementary section of the winding stem (9) and is engaged with a winding crown ( 7) located on the dial side, coaxial with a rocker (6) carrying two winders (5, 10) for winding, respectively timer, in engagement with this winding crown, this rocker (6) being held in the rest position by two counterbalancing forces by balancing t at its pivot axis, respectively applied by a spring (12) and a lever (77), when the latter is engaged with said rocker (6) by a member (78) pushed axially by the rod of rod winder, when the latter is in its axial position screwed on said element secured to said housing. Mechanism according to claim 1, wherein a stop (13) serves to limit the tilting angle of said rocker (6) by the force exerted by said spring (12), so that said winder return (5) is set engaged in the winding position of said winding stem (9) by the torque exerted on this rocker (6) by said winding pinion (8). Mechanism according to claim 1 wherein said latch (6) is brought into said setting position by said pull tab (14).

Images