EP0947895A1 - Watch glass with a lens and method for manufacturing such a glass - Google Patents
Watch glass with a lens and method for manufacturing such a glass Download PDFInfo
- Publication number
- EP0947895A1 EP0947895A1 EP98106048A EP98106048A EP0947895A1 EP 0947895 A1 EP0947895 A1 EP 0947895A1 EP 98106048 A EP98106048 A EP 98106048A EP 98106048 A EP98106048 A EP 98106048A EP 0947895 A1 EP0947895 A1 EP 0947895A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lens
- glass
- recess
- periphery
- watch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
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- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
- G04B39/008—Watch crystals; Fastening or sealing of crystals; Clock glasses with means for magnified reading
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
- Y10T428/216—Ornamental, decorative, pattern, or indicia
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
- Y10T428/219—Edge structure
Definitions
- the present invention relates to a watch crystal comprising an optical lens shaped in the thickness ice material, as well as a method of manufacture of such a lens.
- the lens is protruding on the upper face or the lower face of the glass, its shape can be arbitrary.
- the lens can then be made of a block with the ice if it is produced by molding, for example of a material synthetic such as PMMA.
- the ice is made a hard material like sapphire, which is difficult to machine and polish, such a protruding lens is usually made separately, then glued to the ice cream. This presents mounting difficulties and risks of delamination during use.
- the lenses protruding are exposed to wear and shock if they are on the outside of the glass, or have a annoying bulk vis-à-vis the watch hands if they are on the inside.
- Patent EP 0 123 891 describes a process for forming such a lens in a plate mineral matter, especially sapphire, by machining with by means of a rotary grinding wheel with an oscillating movement of the grinding wheel or plate. In practice, this process does not only suitable for the production of circular lenses.
- Another construction consists in separately manufacturing the lens and the plate intended to form the ice, to spare in the thickness of the plate a blind housing having a depth substantially equal to the thickness of the lens, then fix the lens in this housing.
- the plate and the lens can be in particular glass, spinel, corundum or sapphire. This has the advantage to allow a non-circular shape of the lens, by example an elongated shape to facilitate the reading of a indication in a rectangular window.
- the manufacturing process remains rather complicated, in particular because you have to machine and polish the recess in addition to two sides of the lens, and the risk of the lens remains.
- the present invention aims to avoid the drawbacks mentioned above, in particular with glasses and lenses in hard material, by making a simple watch crystal, resistant and attractive.
- a basic idea of the invention consists in carrying out a corundum, sapphire or spinel watch glass, comprising an optical lens shaped in the thickness of ice material, this lens having a non-circular periphery.
- the periphery may have re-entrant angles and may be for example rectangular.
- another aspect of the invention relates to a method for manufacturing an optical lens non-circular in the thickness of a watch glass in hard mineral matter, especially of corundum, sapphire or spinel, characterized in that it comprises the stages successive consisting of forming by machining in one face ice, a recess with a non-circular periphery, the recess having side walls and a curved bottom intended to constitute a surface of the lens, and to polish at least the bottom of the recess using a brush back and forth to strike the bottom, with the addition of a polishing agent.
- Machining can be carried out for example by ultrasound by means of a sonotrode, or by etching by means of a rotary tool.
- the brush can be animated, in addition to its back and forth movement, of a transverse movement, for example thanks to a rotation about a substantially perpendicular axis ice and located away from the lens.
- Watch glass 1 shown in Figures 1 and 3 is made of a hard transparent crystalline material of the corundum family, for example sapphire or spinel. It can have any shape in plan, which is a barrel shape in this case as well in elevation, for example a flat, domed or facets.
- Figure 3 shows a case where the face upper 2 and the lower face 3 of the glass are flat.
- a rectangular converging lens 4 is made in the thickness of the material of the ice 1, its shape being determined by a recess 5 formed in the underside 3 of the ice. This recess presents side walls 6 around its periphery and a curved bottom 7 constituting the lower surface of the lens 4.
- the upper surface 8 of the lens is formed directly by the upper face 2 of the glass.
- lens 4 has a shape particularly elongated rectangular, allowing read for example a date indicated in the form of the day of the week and the calendar.
- the surface domed lower 7 of the lens will preferably have a cylindrical shape.
- Figure 2 shows an example of a mirror 11 in the thickness of which a lens is formed spherical 12 having a non-circular plane shape any, to obtain aesthetic effects individuals.
- the periphery of the lens 12 may have in particular straight sides 13, curved sides 14 and inside angles 15. The watch creator has thus greater freedom of choice.
- Glass 1 and its lens 4 can be produced as follows. Before making the lens, we can make ice 1 by conventional methods machining and polishing the material from which it is made. However, note that the polishing of its underside can be done at least partially after machining the lens, i.e. at the same time as the polishing of the curved face 7 of the lens.
- Machining for lens shaping 4 consists in digging the recess 5 in the face 3 of the ice by any suitable technique.
- a technique preferred is that of ultrasonic machining using of a sonotrode 20 as shown in FIG. 4, the ultrasonic vibration being represented by the double arrow 21.
- the glass 1 is placed upside down on an anvil 22.
- the end 23 of the sonotrode has a shape three-dimensional which corresponds to the desired final shape of the recess 5.
- the sonotrode 20 is filled with diamond and a liquid is also injected loaded with diamond powder through 24 conduits to the end of the sonotrode. This machining produces a recess 5 whose surfaces are matt and whose side walls 6 are substantially perpendicular to the side 3 of the ice.
- Another machining method that can be used to form the recess 5 is that of the engraving by means of a tool rotary such as a diamond cutter by copying from of a model. If the plan shape of the recess is present re-entrant angles, these will then be slightly rounded.
- the side walls 6 can be inclined one way or the other compared to normal to the side 3.
- a polishing agent such as a paste or a liquid (especially oil or beeswax) loaded with diamond powder is applied to the ice, by example by injection through brush 33.
- a polishing agent such as a paste or a liquid (especially oil or beeswax) loaded with diamond powder is applied to the ice, by example by injection through brush 33.
- the brush 33 also has a transverse displacement opposite each window, so that the bristles of the brush move relative to the surfaces to be polished.
- this displacement is obtained simply by a rotation 38 around the axis 36 of the brush, this axis being located at a distance from the glass and lenses.
- the process described above is characterized by a great simplicity, since the lens can be polished the same time as ice, and it provides lenses of any shape, shaped in the material ice itself.
- This process is particularly advantageous compared to the manufacture of a lens added according to document EP 0 814 388, which required to machine and polish the two sides of the glass, the recess intended to receive the lens, as well than the two sides of the lens made separately. he also avoids the problems associated with adjusting the lens in its housing, sticking and the risk of peeling off.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
La présente invention concerne une glace de montre comprenant une lentille optique façonnée dans l'épaisseur de la matière de la glace, ainsi qu'un procédé de fabrication d'une telle lentille.The present invention relates to a watch crystal comprising an optical lens shaped in the thickness ice material, as well as a method of manufacture of such a lens.
Il est bien connu de réaliser sur une glace de montre une lentille grossissante afin de faciliter la lecture d'une petite partie des moyens d'affichage de la montre, par exemple un indicateur de date dans un guichet. Selon un mode de réalisation courant, la lentille est saillante sur la face supérieure ou la face inférieure de la glace, sa forme pouvant être quelconque. La lentille peut alors être faite d'un bloc avec la glace si celle-ci est fabriquée par moulage, par exemple en une matière synthétique telle que le PMMA. Mais si la glace est faite d'une matière dure telle que le saphir, qui est difficile à usiner et à polir, une telle lentille saillante est généralement fabriquée séparément, puis collée sur la glace. Ceci présente des difficultés de montage et des risques de décollement à l'usage. En outre, les lentilles saillantes sont exposées à l'usure et aux chocs si elles sont sur la face extérieure de la glace, ou présentent un encombrement gênant vis-à-vis des aiguilles de la montre si elles sont sur la face intérieure.It is well known to make on watch glass a magnifying lens to facilitate reading a small part of the display means of the watch, for example a date indicator in a window. According to a common embodiment, the lens is protruding on the upper face or the lower face of the glass, its shape can be arbitrary. The lens can then be made of a block with the ice if it is produced by molding, for example of a material synthetic such as PMMA. But if the ice is made a hard material like sapphire, which is difficult to machine and polish, such a protruding lens is usually made separately, then glued to the ice cream. This presents mounting difficulties and risks of delamination during use. In addition, the lenses protruding are exposed to wear and shock if they are on the outside of the glass, or have a annoying bulk vis-à-vis the watch hands if they are on the inside.
Ceci a conduit à réaliser des lentilles disposées dans l'épaisseur de la glace, de préférence dans la face inférieure afin d'éviter que des saletés se déposent le long de leur bord. Le brevet EP 0 123 891 décrit un procédé pour former une telle lentille dans une plaque en matière minérale, notamment en saphir, par usinage au moyen d'une meule rotative avec un mouvement oscillant de la meule ou de la plaque. En pratique, ce procédé ne convient que pour la fabrication de lentilles circulaires. This led to the production of lenses arranged in the thickness of the ice, preferably in the face lower to prevent dirt from settling on the along their edge. Patent EP 0 123 891 describes a process for forming such a lens in a plate mineral matter, especially sapphire, by machining with by means of a rotary grinding wheel with an oscillating movement of the grinding wheel or plate. In practice, this process does not only suitable for the production of circular lenses.
Une autre construction, décrite dans la publication EP 0 814 388 A, consiste à fabriquer séparément la lentille et la plaque destinée à former la glace, ménager dans l'épaisseur de la plaque un logement borgne ayant une profondeur sensiblement égale à l'épaisseur de la lentille, puis fixer la lentille dans ce logement. La plaque et la lentille peuvent être notamment en verre, en spinelle, en corindon ou en saphir. Ceci offre l'avantage de permettre une forme non circulaire de la lentille, par exemple une forme allongée pour faciliter la lecture d'une indication dans un guichet rectangulaire. Cependant, le procédé de fabrication reste assez compliqué, notamment parce qu'il faut usiner et polir l'évidement en plus des deux faces de la lentille, et le risque de décollement de la lentille subsiste.Another construction, described in the publication EP 0 814 388 A, consists in separately manufacturing the lens and the plate intended to form the ice, to spare in the thickness of the plate a blind housing having a depth substantially equal to the thickness of the lens, then fix the lens in this housing. The plate and the lens can be in particular glass, spinel, corundum or sapphire. This has the advantage to allow a non-circular shape of the lens, by example an elongated shape to facilitate the reading of a indication in a rectangular window. However, the manufacturing process remains rather complicated, in particular because you have to machine and polish the recess in addition to two sides of the lens, and the risk of the lens remains.
La présente invention vise à éviter les inconvénients susmentionnés, en particulier avec des glaces et lentilles en matériau dur, en réalisant une glace de montre simple, résistante et attractive.The present invention aims to avoid the drawbacks mentioned above, in particular with glasses and lenses in hard material, by making a simple watch crystal, resistant and attractive.
Une idée de base de l'invention consiste à réaliser une glace de montre en corindon, saphir ou spinelle, comprenant une lentille optique façonnée dans l'épaisseur de la matière de la glace, cette lentille ayant un pourtour non circulaire. Dans une forme préférée, le pourtour peut présenter des angles rentrants et peut être par exemple rectangulaire.A basic idea of the invention consists in carrying out a corundum, sapphire or spinel watch glass, comprising an optical lens shaped in the thickness of ice material, this lens having a non-circular periphery. In a preferred form, the periphery may have re-entrant angles and may be for example rectangular.
A notre connaissance, le fait qu'une telle glace de montre n'a jamais été réalisée auparavant résulte de ce qu'on ne savait pas comment la fabriquer. En effet, si éventuellement on avait trouvé un procédé pour creuser un évidement dans une plaque de matière dure telle que le saphir et que l'on pouvait envisager de donner au fond de cet évidement la forme bombée de la lentille, on obtenait ainsi une surface mate et l'on ne savait pas comment la polir pour lui donner les propriétés optiques et esthétiques voulues. Ce problème est résolu avec le procédé qui sera décrit plus loin. To our knowledge, the fact that such ice cream watch has never been made before results from this we didn't know how to make it. Indeed, if eventually we found a method to dig a recess in a plate of hard material such as sapphire and that we could consider giving to the bottom of this recess the convex shape of the lens, we obtained thus a matt surface and we didn't know how the polish to give it the optical properties and desired aesthetics. This problem is solved with the process which will be described later.
Plus particulièrement, un autre aspect de l'invention concerne un procédé de fabrication d'une lentille optique non circulaire dans l'épaisseur d'une glace de montre en matière minérale dure, notamment en corindon, saphir ou spinelle, caractérisé en ce qu'il comporte les étapes successives consistant à former par usinage dans une face de la glace un évidement à pourtour non circulaire, l'évidement ayant des parois latérales et un fond bombé destiné à constituer une surface de la lentille, et polir au moins le fond de l'évidement au moyen d'une brosse animée d'un mouvement de va-et-vient pour frapper le fond, avec adjonction d'un agent de polissage.More particularly, another aspect of the invention relates to a method for manufacturing an optical lens non-circular in the thickness of a watch glass in hard mineral matter, especially of corundum, sapphire or spinel, characterized in that it comprises the stages successive consisting of forming by machining in one face ice, a recess with a non-circular periphery, the recess having side walls and a curved bottom intended to constitute a surface of the lens, and to polish at least the bottom of the recess using a brush back and forth to strike the bottom, with the addition of a polishing agent.
L'usinage peut être effectué par exemple par ultrasons au moyen d'une sonotrode, ou par gravure au moyen d'un outil rotatif. Dans l'étape de polissage, la brosse peut être animée, en plus de son mouvement de va-et-vient, d'un mouvement transversal, par exemple grâce à une rotation autour d'un axe sensiblement perpendiculaire à la glace et situé à distance de la lentille.Machining can be carried out for example by ultrasound by means of a sonotrode, or by etching by means of a rotary tool. In the polishing step, the brush can be animated, in addition to its back and forth movement, of a transverse movement, for example thanks to a rotation about a substantially perpendicular axis ice and located away from the lens.
D'autres caractéristiques et avantages de l'invention apparaítront dans la description suivante de divers modes de réalisation préférés, en référence aux dessins annexés, dans lesquels :
- la figure 1 représente la face inférieure d'une glace de montre comprenant une lentille rectangulaire;
- la figure 2 représente la face inférieure d'une autre glace de montre comprenant une lentille ayant une autre forme non circulaire;
- la figure 3 est une vue en coupe agrandie de la glace dans la région de la lentille, suivant la ligne III-III de la figure 1;
- la figure 4 est une vue en coupe schématique illustrant l'usinage de la lentille de la figure 3 par ultrasons, et
- la figure 4 est une vue en coupe schématique illustrant le polissage de la glace et de la lentille de la figure 3.
- Figure 1 shows the underside of a watch crystal comprising a rectangular lens;
- Figure 2 shows the underside of another watch crystal comprising a lens having another non-circular shape;
- Figure 3 is an enlarged sectional view of the ice in the region of the lens, taken along line III-III of Figure 1;
- FIG. 4 is a schematic sectional view illustrating the machining of the lens of FIG. 3 by ultrasound, and
- FIG. 4 is a schematic sectional view illustrating the polishing of the glass and of the lens of FIG. 3.
La glace de montre 1 représentée aux figures 1 et 3
est faite d'une matière cristalline transparente dure de
la famille du corindon, par exemple le saphir ou le
spinelle. Elle peut avoir une forme quelconque en plan,
qui est une forme en "tonneau" dans le cas présent, ainsi
qu'en élévation, par exemple une forme plate, bombée ou à
facettes. La figure 3 représente un cas où la face
supérieure 2 et la face inférieure 3 de la glace sont
planes. Une lentille convergente rectangulaire 4 est
réalisée dans l'épaisseur de la matière de la glace 1, sa
forme étant déterminée par un évidement 5 ménagé dans la
face inférieure 3 de la glace. Cet évidement présente des
parois latérales 6 sur son pourtour et un fond bombé 7
constituant la surface inférieure de la lentille 4. La
surface supérieure 8 de la lentille est formée directement
par la face supérieure 2 de la glace.Watch
Dans cet exemple, la lentille 4 a une forme
rectangulaire particulièrement allongée, permettant de
lire par exemple une date indiquée sous la forme du jour
de la semaine et du quantième. En conséquence, la surface
inférieure bombée 7 de la lentille aura de préférence une
forme cylindrique.In this example,
La présente invention s'applique toutefois à des
lentilles ayant d'autres formes non circulaires de leur
pourtour. La figure 2 montre à titre d'exemple une glace
11 dans l'épaisseur de laquelle est formée une lentille
sphérique 12 ayant une forme en plan non circulaire
quelconque, permettant d'obtenir des effets esthétiques
particuliers. Le pourtour de la lentille 12 peut présenter
notamment des côtés droits 13, des côtés incurvés 14 et
des angles rentrants 15. Le créateur de la montre dispose
ainsi d'une plus grande liberté de choix.The present invention however applies to
lenses having other non-circular forms of their
around. Figure 2 shows an example of a
La glace 1 et sa lentille 4 peuvent être fabriquées
de la manière suivante. Avant de réaliser la lentille, on
peut fabriquer la glace 1 par des méthodes classiques
d'usinage et de polissage du matériau dont elle est faite.
Cependant on notera que le polissage de sa face inférieure
peut s'effectuer au moins en partie après l'usinage de la
lentille, c'est-à-dire en même temps que le polissage de
la face bombée 7 de la lentille.
L'usinage pour la mise en forme de la lentille 4
consiste à creuser l'évidement 5 dans la face 3 de la
glace par toute technique appropriée. Dans le cas d'une
lentille non circulaire, notamment si le pourtour de la
lentille présente des angles rentrants, une technique
préférée est celle de l'usinage aux ultrasons au moyen
d'une sonotrode 20 telle que représentée à la figure 4, la
vibration ultrasonique étant figurée par la double flèche
21. La glace 1 est posée à l'envers sur une enclume 22.
L'extrémité 23 de la sonotrode a une forme
tridimensionnelle qui correspond à la forme finale voulue
de l'évidement 5. De préférence, la sonotrode 20 est
garnie de diamant et l'on injecte en outre un liquide
chargé de poudre de diamant à travers des conduits 24
jusqu'à l'extrémité de la sonotrode. Cet usinage produit
un évidement 5 dont les surfaces sont mates et dont les
parois latérales 6 sont sensiblement perpendiculaires à la
face 3 de la glace.Machining for lens shaping 4
consists in digging the
Une autre méthode d'usinage utilisable pour former
l'évidement 5 est celle de la gravure au moyen d'un outil
rotatif telle qu'une fraise diamantée par copie à partir
d'un modèle. Si la forme en plan de l'évidement présente
des angles rentrants, ceux-ci seront alors légèrement
arrondis. Les parois latérales 6 peuvent être inclinées
dans un sens ou dans l'autre par rapport à la normale à la
face 3.Another machining method that can be used to form
the
On procède ensuite au polissage de la surface bombée
7 de la lentille, ainsi que des parois latérales 6 de
l'évidement 5, par une technique dite de "brossage-tapage"
illustrée par la figure 5. La glace 1 est posée à l'envers
dans un châssis 30 supporté par une table horizontale
rotative 31 tournant autour d'un axe 32 situé à distance
de la glace. En pratique, plusieurs glaces 1 sont
réparties sur la table 31 pour être polies en même temps.
Au-dessus de ces glaces se trouve une grande brosse
circulaire 33 dont les poils 34 sont dirigés vers les
glaces 1. La brosse 33 est fixée à un arbre vertical 39
animé d'un mouvement de va-et-vient 35 parallèle à son axe
36. Il en résulte que les extrémités des poils 34 frappent
à la fois la face 3 de la glace, le fond et les parois
latérales de l'évidement 5. En même temps, comme l'indique
la flèche 37, un agent de polissage tel qu'une pâte ou un
liquide (notamment de l'huile ou de la cire d'abeille)
chargé de poudre de diamant est appliqué sur la glace, par
exemple par injection à travers la brosse 33. On obtient
ainsi le poli optique voulu aussi bien sur la lentille que
sur le reste de la glace.We then polish the
De préférence, la brosse 33 présente en outre un
déplacement transversal en regard de chaque glace, afin
que les poils de la brosse se déplacent par rapport aux
surfaces à polir. Dans le présent exemple, ce déplacement
est obtenu simplement par une rotation 38 autour de l'axe
36 de la brosse, cet axe étant situé à distance des glaces
et des lentilles.Preferably, the
Le procédé décrit ci-dessus se caractérise par une grande simplicité, puisque la lentille peut être polie en même temps que la glace, et il permet d'obtenir des lentilles de forme quelconque, façonnées dans la matière de la glace elle-même. Ce procédé est particulièrement avantageux par rapport à la fabrication d'une glace à lentille rapportée selon le document EP 0 814 388, qui imposait d'usiner et polir séparément les deux faces de la glace, l'évidement destiné à recevoir la lentille, ainsi que les deux faces de la lentille fabriquée séparément. Il évite en outre les problèmes liés à l'ajustement de la lentille dans son logement, au collage et au risque de décollement.The process described above is characterized by a great simplicity, since the lens can be polished the same time as ice, and it provides lenses of any shape, shaped in the material ice itself. This process is particularly advantageous compared to the manufacture of a lens added according to document EP 0 814 388, which required to machine and polish the two sides of the glass, the recess intended to receive the lens, as well than the two sides of the lens made separately. he also avoids the problems associated with adjusting the lens in its housing, sticking and the risk of peeling off.
Claims (10)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE69827768T DE69827768D1 (en) | 1998-04-02 | 1998-04-02 | Watch glass with a lens and method for producing such a lens |
| EP98106048A EP0947895B1 (en) | 1998-04-02 | 1998-04-02 | Watch glass with a lens and method for manufacturing such a glass |
| US09/275,403 US6406769B1 (en) | 1998-04-02 | 1999-03-24 | Watch crystal including a lens and manufacturing method for such a lens |
| CN99104715A CN1230706A (en) | 1998-04-02 | 1999-04-01 | Watch crystal including lens and manufacturing method for such lens |
| JP11096278A JP2000065960A (en) | 1998-04-02 | 1999-04-02 | Wristwatch glass including lens and manufacture of such lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98106048A EP0947895B1 (en) | 1998-04-02 | 1998-04-02 | Watch glass with a lens and method for manufacturing such a glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0947895A1 true EP0947895A1 (en) | 1999-10-06 |
| EP0947895B1 EP0947895B1 (en) | 2004-11-24 |
Family
ID=8231707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98106048A Expired - Lifetime EP0947895B1 (en) | 1998-04-02 | 1998-04-02 | Watch glass with a lens and method for manufacturing such a glass |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6406769B1 (en) |
| EP (1) | EP0947895B1 (en) |
| JP (1) | JP2000065960A (en) |
| CN (1) | CN1230706A (en) |
| DE (1) | DE69827768D1 (en) |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH368756A (en) * | 1960-01-25 | 1962-12-29 | Kyburz & Cie | Calendar timepiece |
| FR2007577A1 (en) * | 1968-05-01 | 1970-01-09 | Klingenberg Hans | |
| CH495003A (en) * | 1968-08-09 | 1970-01-30 | Triebold Agon Uhren | Timepiece |
| JPS61214959A (en) * | 1985-03-18 | 1986-09-24 | Canon Inc | Vibration polishing apparatus |
| US5230182A (en) * | 1992-07-31 | 1993-07-27 | Hughes Aircraft Company | Apparatus for optical materials fabrication by ultrasonic machining |
| EP0814288A1 (en) | 1996-06-20 | 1997-12-29 | Firma Carl Freudenberg | Sealing device for an annular gap between a casing and a shaft |
| EP0814388A1 (en) * | 1996-06-19 | 1997-12-29 | Hans Stettler AG | Watch glass |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043116A (en) * | 1976-01-29 | 1977-08-23 | Metallprodukte A.G. Grenchen | Timepiece comprising a flat display device exposed through an opening in a case |
| CH651773A5 (en) | 1983-03-31 | 1985-10-15 | Comadur Sa | PROCESS FOR FORMING A CONVERGENT LENS IN A PLATE OF TRANSPARENT MINERAL MATERIAL. |
| JP3634592B2 (en) * | 1997-01-08 | 2005-03-30 | セイコーエプソン株式会社 | Bonding fixtures, electronic devices and watches |
-
1998
- 1998-04-02 EP EP98106048A patent/EP0947895B1/en not_active Expired - Lifetime
- 1998-04-02 DE DE69827768T patent/DE69827768D1/en not_active Expired - Lifetime
-
1999
- 1999-03-24 US US09/275,403 patent/US6406769B1/en not_active Expired - Fee Related
- 1999-04-01 CN CN99104715A patent/CN1230706A/en active Pending
- 1999-04-02 JP JP11096278A patent/JP2000065960A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH368756A (en) * | 1960-01-25 | 1962-12-29 | Kyburz & Cie | Calendar timepiece |
| FR2007577A1 (en) * | 1968-05-01 | 1970-01-09 | Klingenberg Hans | |
| CH495003A (en) * | 1968-08-09 | 1970-01-30 | Triebold Agon Uhren | Timepiece |
| JPS61214959A (en) * | 1985-03-18 | 1986-09-24 | Canon Inc | Vibration polishing apparatus |
| US5230182A (en) * | 1992-07-31 | 1993-07-27 | Hughes Aircraft Company | Apparatus for optical materials fabrication by ultrasonic machining |
| EP0814388A1 (en) * | 1996-06-19 | 1997-12-29 | Hans Stettler AG | Watch glass |
| EP0814288A1 (en) | 1996-06-20 | 1997-12-29 | Firma Carl Freudenberg | Sealing device for an annular gap between a casing and a shaft |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 11, no. 50 (M - 562) 17 February 1987 (1987-02-17) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016033253A1 (en) * | 2014-08-27 | 2016-03-03 | Apple Inc. | Sapphire cover for electronic devices |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000065960A (en) | 2000-03-03 |
| DE69827768D1 (en) | 2004-12-30 |
| EP0947895B1 (en) | 2004-11-24 |
| US6406769B1 (en) | 2002-06-18 |
| CN1230706A (en) | 1999-10-06 |
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