EP0216420B1 - Watch with a rotating bezel - Google Patents

Watch with a rotating bezel Download PDF

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Publication number
EP0216420B1
EP0216420B1 EP19860201545 EP86201545A EP0216420B1 EP 0216420 B1 EP0216420 B1 EP 0216420B1 EP 19860201545 EP19860201545 EP 19860201545 EP 86201545 A EP86201545 A EP 86201545A EP 0216420 B1 EP0216420 B1 EP 0216420B1
Authority
EP
European Patent Office
Prior art keywords
bezel
ring
rotating
rotating bezel
synthetic material
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.)
Expired
Application number
EP19860201545
Other languages
German (de)
French (fr)
Other versions
EP0216420A1 (en
Inventor
Giancarlo Dal Busco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Remy Montavon SA
Original Assignee
Remy Montavon SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Remy Montavon SA filed Critical Remy Montavon SA
Publication of EP0216420A1 publication Critical patent/EP0216420A1/en
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Publication of EP0216420B1 publication Critical patent/EP0216420B1/en
Expired legal-status Critical Current

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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
    • G04B19/00—Indicating the time by visual means
    • G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
    • G04B19/283—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel

Definitions

  • the present invention relates to a watch with a rotating bezel comprising a rotating bezel rotatably mounted around a cylindrical surface of a fixed bezel forming part of the case middle, this rotating bezel being retained axially on the middle by an annular scope radial cooperating with a ring integral with the middle part and being provided with sawtooth teeth cooperating with pawls coming from one piece with an integral part of the middle part, so as to allow the rotation of the rotating bezel in a single sense and maintain this rotating bezel in the manually placed position.
  • a watch of this type is known from patent DE 3,205,821.
  • the radial bearing of the rotating bezel is constituted by an attached ring, fixed by means of screws. This added ring is retained by the shoulder of a ring fixed to the middle part.
  • the serration toothing of the rotating bezel is a field toothing formed on the attached ring, this field toothing cooperating with pawls formed by cut tabs and raised in a metal ring freely mounted in a housing of the middle part.
  • the installation of such a rotating bezel is relatively complicated.
  • the object of the present invention is to produce a rotating bezel of simpler construction and capable of being easily mounted and dismounted on the watch case. It aims in particular to allow a simple and quick replacement of the rotating bezel during an after-sales service.
  • the rotating bezel into which the tension ring has previously been introduced, is simply pressed onto the cylindrical surface of the middle part.
  • the pawls preferably come from a single piece with a ring of synthetic material itself surrounded by the tension ring.
  • the rotating bezel, the tension ring and the ratchet ring in synthetic material form a previously assembled sub-assembly which can be easily mounted on the cooperating case by a simple pressure.
  • the friction between the synthetic material of the ring and the middle part, as well as the tension ring ensure a very good fixing of the sub-assembly to the box. This sub-assembly can also be removed easily without special tools.
  • the watch shown in FIG. 1 comprises a metal bezel 1 closed on one side by a lens 2 fixed by means of a seal 3 in the notch of the fixed bezel 4 forming part of the middle-bezel, and on the other side by a metal bottom 5.
  • This box houses a movement 6 carried by a casing ring 7 made of synthetic material and supporting a dial 25.
  • the movement 6 is accessible through the middle by a passage of rod 8 with a tube 9.
  • the time-setting rod and its crown have not been shown.
  • the bottom is sealed by a gasket 10.
  • This watch also carries a rotating bezel 11 made of synthetic material mounted on a ratchet ring made of synthetic material 12 and retained axially on this ring 12 by a brass ring 13 of rectangular section driven out on a cylindrical surface of the ring 12.
  • the rotating bezel 11 is provided for this purpose with a groove 14in which engages the brass ring 13.
  • the rotating bezel 11 has, in its lower part, an internal toothing 15 in sawtooth manner cooperating radially with four pawls from a part with the ring 12 and distributed over the circumference of the ring 12.
  • One of these pawls 16 is visible in Figure 1.
  • the rotating bezel 11, the pawl ring 12 and the brass ring 13, playing the role of a tension ring, form a pre-assembled sub-assembly which is easily fixed by hand by insertion on the cylindrical surface 17 of the middle part.
  • pawls 16 of the pawl ring 12 is shown in Figures 2 and 3, Figure 2 showing the ring 12 seen from above.
  • the ring 12 consists of a cylindrical mantle 18 having externally a shoulder 19 forming an axial stop for the tension ring 13.
  • Each pawl 16 comprises an elastic arm 20 cut in the lower half of the ring 12, this arm 20 widening at its end to form a ratchet beak having a radial face 16a on the side of the clockwise direction and an oblique face 16b on the opposite side.
  • the teeth of the sawtooth teeth 15 of the rotating bezel slide on the oblique face 16b by pushing the pawl 16 whose elastic arm 20 flexes.
  • a rotation of the rotating bezel 11 in direction reverse is impossible because the radial face 16a of the pawls abuts against the radial face of the saw teeth of the toothing 15.
  • the use of four pawls 16 ensures centering of the rotating bezel and obtains a snap to the both soft, precise and safe.
  • the sub-assembly formed by the rotating bezel 11, the tensioning ring 13 and the pawl-holding ring 12 is produced in the form of a construction unit which is easy to mount on a box or remove from it.
  • a box which not only simplifies the assembly of the rotating bezel in the factory, but extremely simplifies the after-sales service, it is also possible to equip a box with several kinds of glasses, given the ease of installation and removal of the rotating bezel.
  • FIG. 4 represents such a rotating metal bezel 21.
  • This metal bezel 21 differs from the rotating bezel 11 of FIG. 1 only in that it has a recess in which is inserted a ring made of synthetic material 22 provided with the serrated teeth 15 and which also forms the lower wall of the groove 14. For the rest, this execution is similar to that shown in FIG. 1.
  • FIG. 5 represents a third embodiment, in which the watch case comprises a middle-bezel 23 of synthetic material. This eliminates the pawl ring 12 which is somehow integrated into the middle-bezel 23.
  • the pawls 24, similar to the pawls 16, are formed directly in the material of the middle 23.
  • the profile of the middle- bezel 23 at the rotating bezel 11 corresponds to the profile of the pawl carrier ring 12 of Figure 1, which allows the same rotating bezel 11 to be used as in the first embodiment.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adornments (AREA)

Description

La présente invention a pour objet une montre à lunette tournante comprenant une lunette tournante montée rotativement autour d'une portée cylindrique d'une lunette fixe faisant partie de la carrure de la boîte, cette lunette tournante étant retenue axialement sur la carrure par une portée annulaire radiale coopérant avec une bague solidaire de la carrure et étant munie d'une denture en dents de scie coopérant avec des cliquets venus d'une pièce avec une partie solidaire de la carrure, de manière à autoriser la rotation de la lunette tournante dans un seul sens et à maintenir cette lunette tournante dans la position placée manuellement.The present invention relates to a watch with a rotating bezel comprising a rotating bezel rotatably mounted around a cylindrical surface of a fixed bezel forming part of the case middle, this rotating bezel being retained axially on the middle by an annular scope radial cooperating with a ring integral with the middle part and being provided with sawtooth teeth cooperating with pawls coming from one piece with an integral part of the middle part, so as to allow the rotation of the rotating bezel in a single sense and maintain this rotating bezel in the manually placed position.

Une montre de ce type est connue du brevet DE 3 205 821. Dans cette montre, la portée radiale de la lunette tournante est constituée par une bague rapportée, fixée au moyen de vis. Cette bague rapportée est retenue par l'épaulement d'une bague fixée à la carrure. La denture en dents de scie de la lunette tournante est une denture de champ formée sur la bague rapportée, cette denture de champ coopérant avec des cliquets constitués par des languettes découpées et relevées dans une bague métallique montée librement dans un logement de la carrure. La mise en place d'une telle lunette tournante est relativement compliquée. Il est tout d'abord nécessaire de mettre en place la bague munie des cliquets, puis de placer la bague munie de la denture en dents de scie, puis de chasser la bague de retenue sur la carrure est enfin de mettre en place la lunette et de fixer la bague dentée au moyen de vis à la lunette. Un changement de lunette tournante est difficilement envisageable, étant donné qu'il apparaît très difficile de retirer la bague de retenue de la carrure.A watch of this type is known from patent DE 3,205,821. In this watch, the radial bearing of the rotating bezel is constituted by an attached ring, fixed by means of screws. This added ring is retained by the shoulder of a ring fixed to the middle part. The serration toothing of the rotating bezel is a field toothing formed on the attached ring, this field toothing cooperating with pawls formed by cut tabs and raised in a metal ring freely mounted in a housing of the middle part. The installation of such a rotating bezel is relatively complicated. It is first necessary to put in place the ring provided with the pawls, then to place the ring provided with the serration teeth, then to drive out the retaining ring on the middle part is finally to put in place the bezel and to fix the toothed ring by means of screws to the telescope. It is difficult to envisage changing the rotating bezel, since it appears very difficult to remove the retaining ring from the middle part.

La présente invention a pour but de réaliser une lunette tournante de construction plus simple et susceptible d'être montée et démontée facilement sur la boîte de montre. Elle a notamment pour but de permettre un remplacement simple et rapide de la lunette tournante lors d'un service après-vente.The object of the present invention is to produce a rotating bezel of simpler construction and capable of being easily mounted and dismounted on the watch case. It aims in particular to allow a simple and quick replacement of the rotating bezel during an after-sales service.

Ce but est atteint par les moyens définis par la revendication 1.This object is achieved by the means defined by claim 1.

Pour sa mise en place, la lunette tournante, dans laquelle on a préalablement introduit la bague de tension, est simplement pressée sur la portée cylindrique de la carrure.For its installation, the rotating bezel, into which the tension ring has previously been introduced, is simply pressed onto the cylindrical surface of the middle part.

En général, dans le cas d'une boîte en métal, les cliquets sont de préférence venus d'une pièce avec une bague en matière synthétique elle-même entourée par la bague de tension. La lunette tournante, la bague de tension et la bague porte-cliquets en matière synthétique forment un sous-ensemble préalablement assemblé qui se laisse facilement monter sur la coopérant de la boîte par une simple pression. Le frottement entre la matière synthétique de la bague et la carrure, ainsi que la bague de tension assurent une très bonne fixation du sous-ensemble à la boîte. Ce sous-ensemble peut être également enlevé facilement sans outillage spécial.In general, in the case of a metal box, the pawls preferably come from a single piece with a ring of synthetic material itself surrounded by the tension ring. The rotating bezel, the tension ring and the ratchet ring in synthetic material form a previously assembled sub-assembly which can be easily mounted on the cooperating case by a simple pressure. The friction between the synthetic material of the ring and the middle part, as well as the tension ring ensure a very good fixing of the sub-assembly to the box. This sub-assembly can also be removed easily without special tools.

Dans le cas d'une boîte en matière synthétique, il est cependant possible de supprimer la bague porte-cliquets en formant les cliquets directement dans la matière de la boîte. L'utilisation de matière synthétique pour la denture en dents de scie et les cliquets permet en outre de supprimer totalement la corrosion.

  • Le dessin annexé représente, à titre d'exemple, une forme d'exécution de l'invention.
  • La figure 1 est une vue partielle en coupe axiale d'une boîte de montre selon une première forme d'exécution.
  • La figure 2 est une vue de détail d'une partie de la bague porte-cliquets.
  • La figure 3 est une vue en coupe selon Ill-lll de la figure 2.
  • La figure 4 est une vue partielle en coupe axiale d'une seconde forme d'exécution.
  • La figure 5 est une vue partielle en coupe axiale d'une boîte de montre selon une troisième forme d'exécution.
In the case of a plastic box, it is however possible to remove the pawl ring by forming the pawls directly in the material of the box. The use of synthetic material for sawtooth teeth and pawls also completely eliminates corrosion.
  • The accompanying drawing shows, by way of example, an embodiment of the invention.
  • Figure 1 is a partial view in axial section of a watch case according to a first embodiment.
  • Figure 2 is a detail view of part of the pawl ring.
  • Figure 3 is a sectional view along III-III of Figure 2.
  • Figure 4 is a partial view in axial section of a second embodiment.
  • Figure 5 is a partial view in axial section of a watch case according to a third embodiment.

La montre représentée à la figure 1 comprend une carrure-lunette métallique 1 fermée d'un côté par une glace 2 fixée par l'intermédiaire d'une garniture d'étanchéité 3 dans le cran de glace de la lunette fixe 4 faisant partie de la carrure-lunette, et de l'autre côté par un fond métallique 5. Cette boîte abrite un mouvement 6 porté par un cercle d'encageage 7 en matière synthétique et supportant un cadran 25. Le mouvement 6 est accessible à travers la carrure par un passage de tige 8 gaîné d'un tube 9. La tige de mise à l'heure et sa couronne n'ont pas été représentées. L'étanchéité du fond assurée par une garniture 10.The watch shown in FIG. 1 comprises a metal bezel 1 closed on one side by a lens 2 fixed by means of a seal 3 in the notch of the fixed bezel 4 forming part of the middle-bezel, and on the other side by a metal bottom 5. This box houses a movement 6 carried by a casing ring 7 made of synthetic material and supporting a dial 25. The movement 6 is accessible through the middle by a passage of rod 8 with a tube 9. The time-setting rod and its crown have not been shown. The bottom is sealed by a gasket 10.

Cette montre porte en outre une lunette tournante 11 en matière synthétique montée sur une bague porte-cliquets en matière synthétique 12 et retenue axialement sur cette bague 12 par une bague en laiton 13 de section rectangulaire chassée sur une portée cylindrique de la bague 12. La lunette tournante 11 est munie à cet effet d'une gorge 14dans laquelle s'engage la bague en laiton 13. La lunette tournante 11 présente, dans sa partie inférieure, une denture intérieure 15 en dents de scie coopérant radialement avec quatre cliquets venus d'une pièce avec la bague 12 et répartis sur la circonférence de la bague 12. L'un de ces cliquets 16 est visible à la figure 1. La lunette tournante 11, la bague porte-cliquets 12 et la bague en laiton 13, jouant le rôle d'une bague de tension, forment un sous-ensemble préalablement assemblé qui se fixe aisément à la main par introduction sur la portée cylindrique 17 de la carrure-lunette.This watch also carries a rotating bezel 11 made of synthetic material mounted on a ratchet ring made of synthetic material 12 and retained axially on this ring 12 by a brass ring 13 of rectangular section driven out on a cylindrical surface of the ring 12. The rotating bezel 11 is provided for this purpose with a groove 14in which engages the brass ring 13. The rotating bezel 11 has, in its lower part, an internal toothing 15 in sawtooth manner cooperating radially with four pawls from a part with the ring 12 and distributed over the circumference of the ring 12. One of these pawls 16 is visible in Figure 1. The rotating bezel 11, the pawl ring 12 and the brass ring 13, playing the role of a tension ring, form a pre-assembled sub-assembly which is easily fixed by hand by insertion on the cylindrical surface 17 of the middle part.

La forme de cliquets 16 de la bague porte-cliquets 12 est représentée aux figures 2 et 3, la figure 2 représentant la bague 12 vue de dessus. La bague 12 est constituée d'un manteau cylindrique 18 présentant extérieurement un épaulement 19 formant butée axiale pour la bague de tension 13. Chaque cliquet 16 comprend un bras élastique 20 découpé dans la moitié inférieure de la bague 12, ce bras 20 s'élargissant à son extrémité pour former un bec de cliquet présentant une face radiale 16a du côté de la direction du sens horaire et une face oblique 16b du côté opposé. Lorsque l'utilisateur entraîne la lunette tournante 11 en rotation dans le sens horaire, les dents de la denture en dents de scie 15 de la lunette tournante glissent sur la face oblique 16b en repoussant le cliquet 16 dont le bras élastique 20 fléchit.The form of pawls 16 of the pawl ring 12 is shown in Figures 2 and 3, Figure 2 showing the ring 12 seen from above. The ring 12 consists of a cylindrical mantle 18 having externally a shoulder 19 forming an axial stop for the tension ring 13. Each pawl 16 comprises an elastic arm 20 cut in the lower half of the ring 12, this arm 20 widening at its end to form a ratchet beak having a radial face 16a on the side of the clockwise direction and an oblique face 16b on the opposite side. When the user drives the rotating bezel 11 in clockwise rotation, the teeth of the sawtooth teeth 15 of the rotating bezel slide on the oblique face 16b by pushing the pawl 16 whose elastic arm 20 flexes.

Une rotation de la lunette tournante 11 en sens inverse est impossible car la face radiale 16a des cliquets vient buter contre la face radiale des dents de scie de la denture 15. L'utilisation de quatre cliquets 16 permet d'assurer un centrage de la lunette tournante et d'obtenir un encliquetage à la fois doux, précis et sûr.A rotation of the rotating bezel 11 in direction reverse is impossible because the radial face 16a of the pawls abuts against the radial face of the saw teeth of the toothing 15. The use of four pawls 16 ensures centering of the rotating bezel and obtains a snap to the both soft, precise and safe.

Le sous-ensemble formé par la lunette tournante 11, la bague de tension 13 et la bague porte-cliquets 12 est réalisé sous la forme d'une unité de construction qu'il est facile de monter sur une boîte ou d'enlever d'une boîte, ce qui simplifie non seulement le montage de la lunette tournante en usine, mais simplifie extrêmement le service après-vente, il est en outre possible d'équiper une boîte de plusieurs sortes de lunettes, vu la facilité de pose et dépose de la lunette tournante.The sub-assembly formed by the rotating bezel 11, the tensioning ring 13 and the pawl-holding ring 12 is produced in the form of a construction unit which is easy to mount on a box or remove from it. a box, which not only simplifies the assembly of the rotating bezel in the factory, but extremely simplifies the after-sales service, it is also possible to equip a box with several kinds of glasses, given the ease of installation and removal of the rotating bezel.

Le mode de construction décrit est également applicable à une lunette tournante en métal. La figure 4 représente une telle lunette tournante en métal 21. Cette lunette métallique 21 ne diffère de la lunette tournante 11 de la figure 1 que par le fait qu'elle présente un évidement dans lequel est insérée une bague en matière synthétique 22 munie de la denture en dents de scie 15 et qui vient en outre former la paroi inférieure de la gorge 14. Pour le reste, cette exécution est semblable à celle représentée à la figure 1.The construction method described is also applicable to a rotating metal bezel. FIG. 4 represents such a rotating metal bezel 21. This metal bezel 21 differs from the rotating bezel 11 of FIG. 1 only in that it has a recess in which is inserted a ring made of synthetic material 22 provided with the serrated teeth 15 and which also forms the lower wall of the groove 14. For the rest, this execution is similar to that shown in FIG. 1.

La figure 5 représente une troisième forme d'exécution, dans laquelle la boîte de montre comprend une carrure-lunette 23 en matière synthétique. Ceci permet de supprimer la bague porte-cliquets 12 qui se trouve en quelque sorte intégrée à la carrure-lunette 23. Les cliquets 24, analogues aux cliquets 16, sont formés directement dans la matière de la carrure 23. Le profil de la carrure-lunette 23 au niveau de la lunette tournante 11 correspond au profil de la bague porte-cliquets 12 de la figure 1, ce qui permet d'utiliser la même lunette tournante 11 que dans la première forme d'exécution.FIG. 5 represents a third embodiment, in which the watch case comprises a middle-bezel 23 of synthetic material. This eliminates the pawl ring 12 which is somehow integrated into the middle-bezel 23. The pawls 24, similar to the pawls 16, are formed directly in the material of the middle 23. The profile of the middle- bezel 23 at the rotating bezel 11 corresponds to the profile of the pawl carrier ring 12 of Figure 1, which allows the same rotating bezel 11 to be used as in the first embodiment.

Il est bien entendu possible de monter la lunette 21 de la figure 4 sur la carrure-lunette 23 de la figure 5.It is of course possible to mount the bezel 21 of FIG. 4 on the middle-bezel 23 of FIG. 5.

Claims (4)

1. A rotating-bezel watch comprising a rotating bezel (11; 21) mounted for rotation about a cylindrical bearing surface (17) on a fixed bezel forming part of the middle (1; 23) of the case, said rotating bezel being retained axially on the middle by a radial annular bearing surface cooperating with a ring (13) fastened on the middle and being provided with sawtooth toothing (15) cooperating with clicks (16; 24) formed integrally with a part (12; 23) fastened to the middle, in such a manner as to allow the turning of the rotating bezel in one direction only and to hold said rotating bezel in the position in which it has been placed manually, characterized in that said radial annular bearing of the rotating bezel (11; 21) is formed by one of the side faces on an internal groove (14), that said ring (13) fastened to the middle is a metal tension ring, and that the clicks (16; 24) are of synthetic material and directed radially.
2. A rotating-bezel watch according to claim 1, characterized in that the clicks (16) are formed integrally with a ring (12) of synthetic material gripped between said cylindrical bearing surface (17) of the middle and the tension ring (13).
3. A rotating-bezel watch according to claim 2, characterized in that the rotating bezel (21) is of metal and its sawtooth toothing is formed on a ring (22) of synthetic material fixed in the rotating bezel.
4. A rotating-bezel watch according to claim 1,characterized in that the case (23) is of synthetic material and the clicks (24) are formed integrally with the case.
EP19860201545 1985-09-24 1986-09-09 Watch with a rotating bezel Expired EP0216420B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4123/85 1985-09-24
CH412385A CH662030GA3 (en) 1985-09-24 1985-09-24 Watch with rotating bezel

Publications (2)

Publication Number Publication Date
EP0216420A1 EP0216420A1 (en) 1987-04-01
EP0216420B1 true EP0216420B1 (en) 1988-12-07

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EP19860201545 Expired EP0216420B1 (en) 1985-09-24 1986-09-09 Watch with a rotating bezel

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EP (1) EP0216420B1 (en)
CH (1) CH662030GA3 (en)
DE (1) DE3661392D1 (en)
HK (1) HK138493A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11281167B2 (en) 2016-01-14 2022-03-22 Huawei Technologies Co., Ltd. Electronic device and a method of operating such an electronic device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403717B1 (en) * 1989-06-19 1993-08-04 Roventa-Henex SA Watch with a rotating bezel
CH677713B5 (en) * 1990-01-03 1991-12-31 Rolex Montres
CH683481B5 (en) * 1992-05-01 1994-09-30 Ebauchesfabrik Eta Ag Timepiece including a rotating bezel.
US5654941A (en) * 1995-05-26 1997-08-05 Walca Sa Device for fastening a rotationally symmetrical part, in particular a rotatable ring, a back cover or a watch-glass to a watchcase
EP0770937B1 (en) * 1995-10-27 2000-01-26 Eta SA Fabriques d'Ebauches Timepiece provided with a rotatable bezel
EP2672332B1 (en) * 2012-06-06 2019-11-13 Omega SA Improved rotating bezel system
CN107003788B (en) 2015-10-01 2020-12-15 华为技术有限公司 Electronic device and method of operating the same
US9851695B1 (en) 2016-11-14 2017-12-26 Geoffrey H. H. Roth Watch bezel assembly
EP3543800B1 (en) 2018-03-20 2021-11-10 Omega SA Annular rotating bezel system comprising a spring ring

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CH9583A (en) * 1894-12-10 1895-07-15 G Daverio Plansifter with universal joint suspension
CH312285A (en) * 1953-02-05 1955-12-31 Rolex Montres Watch.
FR2176641B1 (en) * 1972-03-24 1974-12-27 Iga Sa
DE3205821C1 (en) * 1982-02-18 1983-07-21 IWC International Watch Co AG, 8201 Schaffhausen Diving watch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11281167B2 (en) 2016-01-14 2022-03-22 Huawei Technologies Co., Ltd. Electronic device and a method of operating such an electronic device

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DE3661392D1 (en) 1989-01-12
HK138493A (en) 1993-12-24
CH662030GA3 (en) 1987-09-15
EP0216420A1 (en) 1987-04-01

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