EP1930792A2 - Element for a clock piece - Google Patents

Element for a clock piece Download PDF

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Publication number
EP1930792A2
EP1930792A2 EP07122447A EP07122447A EP1930792A2 EP 1930792 A2 EP1930792 A2 EP 1930792A2 EP 07122447 A EP07122447 A EP 07122447A EP 07122447 A EP07122447 A EP 07122447A EP 1930792 A2 EP1930792 A2 EP 1930792A2
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EP
European Patent Office
Prior art keywords
chamfer
bridge
masking
inert
gold
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EP07122447A
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German (de)
French (fr)
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EP1930792A3 (en
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Patrick Baumgartner
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Individual
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Individual
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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
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • 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
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • G04B29/027—Materials and manufacturing
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0069—Watchmakers' or watch-repairers' machines or tools for working materials for working with non-mechanical means, e.g. chemical, electrochemical, metallising, vapourising; with electron beams, laser beams

Definitions

  • the present invention relates to watch movement members, in particular constituting the cage or blank, of the type provided with a chamfer.
  • a chamfer is a flat or rounded connecting surface between two intersecting surfaces.
  • the edges of the bridges are worked to form a chamfer between their edge and their upper face.
  • This chamfer is generally polished, so as to emphasize the shape of the bridges, and thus give them a particularly remarkable aesthetic. It appears indeed that a polished surface in contrast with a surface provided with a matt decoration underlines the purity of the lines.
  • the constituent members of the frame are generally made of brass and covered with a protective layer, usually gold or rhodium, to prevent oxidation, and defining the color of the organ.
  • a protective layer usually gold or rhodium
  • the coating is made by PVD (Physical Vapor Deposition). This type of coating allows the faith to give colors to the bodies of the frame while protecting them. So far, however, these organs have a uniform color, sometimes with contrasting color engravings. For this purpose, the part undergoes a first surface treatment which covers it entirely. The engraved part is then masked and the part undergoes a new surface treatment.
  • An object of the present invention is to allow to better emphasize the shapes of the constituent bodies of the frame and thus enhance the aesthetic appearance of the watch, while ensuring its protection against oxidation.
  • the chamfer has a surface made of a first material and the faces of the member on either side of the chamfer have a surface consisting of at least one second material different from the first material, the first and second materials being inert. This goal can be achieved even without the chamfer being polished.
  • the member is formed of a third material different from the first and second materials, which form a layer on said third material and cover it completely. Effective protection is obtained especially when the first and second materials are one of gold, the other of rhodium and the third of brass.
  • the member is itself formed of an inert material constituting the surface of the chamfer, for example gold.
  • the first and second materials may be one of gold and the other of rhodium, the deposition operations being done by electroplating.
  • Gold or rhodium can be used as the first material, the other then being used as the second material, depending on the desired final appearance and depending on the variant of the process used.
  • the Figures 1 and 2 show, respectively seen in plan and in section, a frame member, in this case a bridge 10, at the beginning of its preparation.
  • the constituent material is brass, cut by milling or stamping. It has a thick section 12 intended to bear on the plate and pierced with unreferenced holes in which engage feet or a screw to ensure its mounting on the plate, and a thinned portion 14 provided with a non-referenced hole, intended to receive a stone, and covering one or more mobile movement.
  • the bridge 10 comprises in particular an upper face 16 and a lateral face 18.
  • the first operation to achieve an organ according to the invention is to create, by filing, a chamfer 20 on the entire periphery of the bridge 10, between the upper face 16 and the side face 18, as can be seen on the figure 3 which represents, enlarged, the portion of the bridge near the screw hole.
  • This chamfer 20 can then be polished in a conventional manner.
  • the bridge 10 undergoes cleaning operations according to procedures well known to those skilled in the art, including degreasing, rinsing, etc., in order to have perfectly clean surfaces.
  • the bridge 10 is then ready to be coated with a galvanic deposit, first nickel, then coloring, for example yellow or red gold. It is thus covered with a nickel underlayer 22 and a gold layer 24, as shown in FIG. figure 4 .
  • the thicknesses of these layers, of the order of a micrometer, are exaggerated to facilitate the reading of the drawing.
  • a masking net 26 is then disposed around the entire periphery of the bridge 10, completely covering the chamfer 20. It may advantageously be produced by means of a varnish marketed by Berlach (Switzerland) under the trademark “Bernit ®” ( figure 5 ).
  • the bridge is then dried so as to cure the varnish, typically for 8 hours at 110 ° C.
  • the varnish of the net 26 is eliminated on the faces 16 and 18, while working their appearance. During this operation, most of the sublayer 22 and the layer 24 is removed. This work is done using an abrasive, chosen according to the expected appearance.
  • the bridge 10 undergoes a new galvanic deposition operation, for example rhodium.
  • rhodium is deposited everywhere, with the exception of the area covered by the masking net 26.
  • the upper faces 16 and side 18 are covered with a layer of rhodium 28.
  • this layer is superimposed on the underlayer nickel 22 and the gold layer 24, as can be seen on the figure 7 .
  • the bridge 10 is then dipped in an acetone bath, which has the effect of dissolving the varnish thread 26.
  • the bridge thus obtained thus has a chamfer 20 whose surface is made of a material of different composition of the bridge 10 and the material constituting the surfaces of the faces 16 and 18. This gives a net of color different from the background color, giving the piece a particularly remarkable appearance ( Figures 8 and 9 ).
  • the bridge is made of brass and the layers forming on the one hand the surface of the chamfer, on the other hand the bridge surfaces are made of inert material.
  • inert material in particular gold
  • the invention also relates to another variant of the manufacturing method.
  • the first operations concerning the formation of the chamfer, the cleaning of the bridge and the galvanic deposition of the first inert material, previously described in paragraphs [0013] to [0016] remain identical.
  • the first inert material deposited according to this variant is rhodium.
  • a masking material is then deposited on the entire bridge, completely covering the part. It can advantageously be achieved by means of a varnish marketed by Berlach (Switzerland) under the trademark "Bernit ®". The bridge is then dried so as to cure the varnish, typically for 8 hours at 110 ° C.
  • the masking material is then removed from the chamfer surface. This operation is done by mechanical means, for example by means of an abrasive. During this operation, most of the layer of the first inert material is removed.
  • the bridge After being cleaned again with care, the bridge undergoes the galvanic deposition operation of the second inert material, for example gold.
  • the latter is deposited only on the surface of the chamfer, the other areas being covered by the masking material.
  • the bridge is then dipped in an acetone bath, which has the effect of dissolving the masking material.
  • the resulting bridge thus presents a chamfer whose surface consists of a material of different composition of the bridge and the constituent material of the surfaces of the faces. This gives a net of different color from the background color, giving the piece a particularly remarkable appearance.
  • all or part of the inert materials can be deposited by PVD (physical vapor deposition).
  • PVD physical vapor deposition

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Adornments (AREA)

Abstract

The element i.e. bridge (10), has an upper face (16) and a lateral face (18) connected with each other by a bezel (20). The bezel is created on all the circumference of the bridge between the upper face and the lateral face. The bezel has a surface made of a gold layer (24). The faces have a surface made of a rhodium layer (28), which is different from the gold layer, where the layers are inert. The bridge is made of material such as gold or brass. An independent claim is also included for a method for manufacturing an element for a clock movement.

Description

Domaine techniqueTechnical area

La présente invention se rapporte aux organes de mouvement d'horlogerie, en particulier constitutifs de la cage ou de l'ébauche, du type muni d'un chanfrein.The present invention relates to watch movement members, in particular constituting the cage or blank, of the type provided with a chamfer.

Etat de la techniqueState of the art

On appelle chanfrein une surface de raccordement, plane ou arrondie, entre deux surfaces se coupant. Ainsi, dans les mouvements de montres de haut de gamme, les arêtes des ponts, notamment, sont travaillées pour former un chanfrein entre leur tranche et leur face supérieure.A chamfer is a flat or rounded connecting surface between two intersecting surfaces. Thus, in the movements of high-end watches, the edges of the bridges, in particular, are worked to form a chamfer between their edge and their upper face.

Ce chanfrein est généralement poli, de manière à souligner la forme des ponts, et ainsi leur conférer une esthétique particulièrement remarquable. Il apparaît en effet qu'une surface polie en contraste avec une surface munie d'un décor mat souligne la pureté des lignes.This chamfer is generally polished, so as to emphasize the shape of the bridges, and thus give them a particularly remarkable aesthetic. It appears indeed that a polished surface in contrast with a surface provided with a matt decoration underlines the purity of the lines.

Les organes constitutifs du bâti sont généralement fabriqués en laiton et recouverts d'une couche de protection, généralement de l'or ou du rhodium, permettant d'éviter une oxydation, et définissant la couleur de l'organe. Il existe également des pièces dans lesquelles le revêtement est réalisé par PVD (Physical Vapor Deposition). Ce type de revêtement permet à la foi de donner des couleurs aux organes du bâti tout en les protégeant. Jusqu'ici, toutefois, ces organes présentent une couleur uniforme, avec parfois des gravures en couleur contrastée. A cet effet, la pièce subit un premier traitement de surface qui la recouvre entièrement. La partie gravée est ensuite masquée et la pièce subit un nouveau traitement de surface.The constituent members of the frame are generally made of brass and covered with a protective layer, usually gold or rhodium, to prevent oxidation, and defining the color of the organ. There are also parts in which the coating is made by PVD (Physical Vapor Deposition). This type of coating allows the faith to give colors to the bodies of the frame while protecting them. So far, however, these organs have a uniform color, sometimes with contrasting color engravings. For this purpose, the part undergoes a first surface treatment which covers it entirely. The engraved part is then masked and the part undergoes a new surface treatment.

Par ailleurs, différentes techniques pour décorer des boites de pièces d'horlogerie sont décrites dans les demandes de brevet EP 98 795 et EP 199 207 . Toutefois, ces documents s'adressent spécifiquement à l'habillage de pièces d'horlogerie et ne sont aucunement concernés par le problème de l'aspect des chanfreins des organes utilisés dans les mouvements d'horlogerie.Moreover, various techniques for decorating timepiece boxes are described in patent applications. EP 98,795 and EP 199,207 . However, these documents are specifically addressed to the cladding of timepieces and are not concerned with the problem of the appearance of the chamfers of the organs used in watch movements.

Divulgation de l'inventionDisclosure of the invention

Un but de la présente invention est de permettre de mieux souligner les formes des organes constitutifs du bâti et ainsi renforcer l'aspect esthétique de la montre, tout en assurant sa protection contre l'oxydation. A cet effet, le chanfrein présente une surface constituée d'un premier matériau et les faces de l'organe de part et d'autre du chanfrein présentent une surface constituée d'un au moins deuxième matériau différent du premier matériau, les premier et deuxième matériaux étant inertes. Ce but peut être atteint même sans que le chanfrein soit poli.An object of the present invention is to allow to better emphasize the shapes of the constituent bodies of the frame and thus enhance the aesthetic appearance of the watch, while ensuring its protection against oxidation. For this purpose, the chamfer has a surface made of a first material and the faces of the member on either side of the chamfer have a surface consisting of at least one second material different from the first material, the first and second materials being inert. This goal can be achieved even without the chamfer being polished.

De manière avantageuse, l'organe est formé d'un troisième matériau différent des premier et deuxième matériaux, lesquels forment une couche sur ledit troisième matériau et le recouvrent complètement. Une protection efficace est obtenue notamment quand les premier et deuxième matériaux sont l'un de l'or, l'autre du rhodium et le troisième du laiton.Advantageously, the member is formed of a third material different from the first and second materials, which form a layer on said third material and cover it completely. Effective protection is obtained especially when the first and second materials are one of gold, the other of rhodium and the third of brass.

Dans une variante, l'organe est lui-même formé d'un matériau inerte constitutif de la surface du chanfrein, par exemple de l'or.In a variant, the member is itself formed of an inert material constituting the surface of the chamfer, for example gold.

La présente invention concerne également un procédé de fabrication d'un organe selon l'invention. Ce procédé comporte les étapes suivantes :

  • formation mécanique du chanfrein,
  • dépôt du premier matériau inerte sur la surface de l'organe,
  • masquage du chanfrein au moyen d'un matériau de masquage,
  • élimination mécanique du matériau de masquage dans les parties recouvrant les faces de l'organe de part et d'autre du chanfrein,
  • dépôt du deuxième matériau inerte, et
  • élimination du matériau de masquage.
The present invention also relates to a method of manufacturing an organ according to the invention. This process comprises the following steps:
  • mechanical formation of the chamfer,
  • deposition of the first inert material on the surface of the organ,
  • masking the chamfer by means of a masking material,
  • mechanical removal of the masking material in the parts covering the faces of the member on either side of the chamfer,
  • deposition of the second inert material, and
  • removal of the masking material.

La présente invention concerne également une autre variante de procédé de fabrication d'un organe selon l'invention. Ce procédé comporte les étapes suivantes:

  • formation mécanique du chanfrein,
  • dépôt du premier matériau inerte sur la surface de l'organe,
  • masquage dudit organe au moyen d'un matériau de masquage,
  • élimination mécanique du matériau de masquage sur le chanfrein,
  • dépôt du deuxième matériau inerte, et
  • élimination du matériau de masquage.
The present invention also relates to another variant of a method for manufacturing an organ according to the invention. This process comprises the following steps:
  • mechanical formation of the chamfer,
  • deposition of the first inert material on the surface of the organ,
  • masking said member by means of a masking material,
  • mechanical removal of the masking material on the chamfer,
  • deposition of the second inert material, and
  • removal of the masking material.

Dans une mise en oeuvre particulièrement simple et avantageuse, les premier et deuxième matériaux peuvent être l'un de l'or et l'autre du rhodium, les opérations de dépôt se faisant par galvanoplastie. L'or ou le rhodium peuvent être utilisés comme premier matériau, l'autre étant alors utilisé comme deuxième matériau, en fonction de l'aspect final souhaité et en fonction de la variante du procédé utilisée.In a particularly simple and advantageous implementation, the first and second materials may be one of gold and the other of rhodium, the deposition operations being done by electroplating. Gold or rhodium can be used as the first material, the other then being used as the second material, depending on the desired final appearance and depending on the variant of the process used.

Brève description des dessinsBrief description of the drawings

D'autres caractéristiques de la présente invention apparaîtront plus clairement à la lecture de la description qui va suivre, faite en référence aux dessins annexés dans lesquels:

  • les figures 1 à 3 représentent schématiquement un organe de bâti,
  • les figures 4 à 9 illustrent les différentes étapes d'un procédé selon l'invention.
Other features of the present invention will emerge more clearly on reading the description which follows, made with reference to the appended drawings in which:
  • the Figures 1 to 3 schematically represent a frame member,
  • the Figures 4 to 9 illustrate the different steps of a method according to the invention.

Mode(s) de réalisation de l'inventionMode (s) of realization of the invention

Les figures 1 et 2 montrent, respectivement vu en plan et en coupe, un organe de bâti, en l'occurrence un pont 10, au début de sa préparation. Le matériau le constituant est du laiton, découpé par fraisage ou étampage. Il présente une section épaisse 12 destinée à prendre appui sur la platine et percée de trous non référencés dans lesquels s'engagent des pieds ou une vis pour assurer son montage sur la platine, et une partie amincie 14 muni d'un trou non référencé, destiné à recevoir une pierre, et recouvrant un ou plusieurs mobiles du mouvement. Le pont 10 comprend notamment une face supérieure 16 et une face latérale 18.The Figures 1 and 2 show, respectively seen in plan and in section, a frame member, in this case a bridge 10, at the beginning of its preparation. The constituent material is brass, cut by milling or stamping. It has a thick section 12 intended to bear on the plate and pierced with unreferenced holes in which engage feet or a screw to ensure its mounting on the plate, and a thinned portion 14 provided with a non-referenced hole, intended to receive a stone, and covering one or more mobile movement. The bridge 10 comprises in particular an upper face 16 and a lateral face 18.

La première opération en vue de réaliser un organe selon l'invention consiste à créer, par limage, un chanfrein 20 sur tout le pourtour du pont 10, entre la face supérieure 16 et la face latérale 18, comme on peut le voir sur la figure 3, qui représente, agrandie, la partie du pont voisine du trou de vis. Ce chanfrein 20 peut ensuite être poli de manière classique.The first operation to achieve an organ according to the invention is to create, by filing, a chamfer 20 on the entire periphery of the bridge 10, between the upper face 16 and the side face 18, as can be seen on the figure 3 which represents, enlarged, the portion of the bridge near the screw hole. This chamfer 20 can then be polished in a conventional manner.

Après quoi, le pont 10 subit des opérations de nettoyage selon des procédures bien connues de l'homme du métier, comportant des phases de dégraissage, de rinçage, etc., en vue de disposer de surfaces parfaitement propres.After that, the bridge 10 undergoes cleaning operations according to procedures well known to those skilled in the art, including degreasing, rinsing, etc., in order to have perfectly clean surfaces.

Le pont 10 est alors prêt à être revêtu d'un dépôt galvanique, tout d'abord de nickel, puis de mise en couleur, par exemple d'or jaune ou rouge. Il est ainsi couvert d'une sous-couche de nickel 22 et d'une couche d'or 24, comme le montre la figure 4. Les épaisseurs de ces couches, de l'ordre du micromètre, sont exagérées pour faciliter la lecture du dessin.The bridge 10 is then ready to be coated with a galvanic deposit, first nickel, then coloring, for example yellow or red gold. It is thus covered with a nickel underlayer 22 and a gold layer 24, as shown in FIG. figure 4 . The thicknesses of these layers, of the order of a micrometer, are exaggerated to facilitate the reading of the drawing.

Un filet de masquage 26 est ensuite disposé sur tout le pourtour du pont 10, recouvrant complètement le chanfrein 20. Il peut avantageusement être réalisé au moyen d'un verni commercialisé par la maison Berlach (Suisse) sous la marque « Bernit ® » (figure 5).A masking net 26 is then disposed around the entire periphery of the bridge 10, completely covering the chamfer 20. It may advantageously be produced by means of a varnish marketed by Berlach (Switzerland) under the trademark "Bernit ®" ( figure 5 ).

Le pont est ensuite séché de manière à durcir le verni, typiquement durant 8 heures à 110°C.The bridge is then dried so as to cure the varnish, typically for 8 hours at 110 ° C.

Ainsi qu'on peut le voir sur la figure 6, le verni du filet 26 est éliminé sur les faces 16 et 18, tout en travaillant leur aspect. Durant cette opération, l'essentiel de la sous-couche 22 et de la couche 24 est éliminé. Ce travail s'effectue au moyen d'un abrasif, choisi en fonction de l'aspect attendu.As can be seen on the figure 6 , the varnish of the net 26 is eliminated on the faces 16 and 18, while working their appearance. During this operation, most of the sublayer 22 and the layer 24 is removed. This work is done using an abrasive, chosen according to the expected appearance.

Après avoir été, une nouvelle fois, nettoyé avec soin, le pont 10 subit une nouvelle opération de dépôt galvanique, par exemple de rhodium. Ce dernier se dépose partout, à l'exception de la zone couverte par le filet de masquage 26. En d'autres termes, les faces supérieure 16 et latérale 18 sont recouvertes d'une couche de rhodium 28. Sur la face inférieure et dans les trous, cette couche se superpose à la sous-couche de nickel 22 et à la couche d'or 24, ainsi qu'on peut le voir sur la figure 7.After being cleaned again carefully, the bridge 10 undergoes a new galvanic deposition operation, for example rhodium. The latter is deposited everywhere, with the exception of the area covered by the masking net 26. In other words, the upper faces 16 and side 18 are covered with a layer of rhodium 28. On the underside and in the the holes, this layer is superimposed on the underlayer nickel 22 and the gold layer 24, as can be seen on the figure 7 .

Le pont 10 est ensuite trempé dans un bain d'acétone, ce qui a pour effet de dissoudre le filet de verni 26. Le pont ainsi obtenu présente ainsi un chanfrein 20 dont la surface est constituée d'un matériau de composition différente du pont 10 et du matériau constitutif des surfaces des faces 16 et 18. On obtient ainsi un filet de couleur différente de la couleur de fond, donnant à la pièce un aspect particulièrement remarquable (figures 8 et 9).The bridge 10 is then dipped in an acetone bath, which has the effect of dissolving the varnish thread 26. The bridge thus obtained thus has a chamfer 20 whose surface is made of a material of different composition of the bridge 10 and the material constituting the surfaces of the faces 16 and 18. This gives a net of color different from the background color, giving the piece a particularly remarkable appearance ( Figures 8 and 9 ).

On relèvera que, contrairement à ce qui apparaît sur les figures, il n'y a pas de décalage apparent entre les couches de rhodium 28 et d'or 24, du fait que celles-ci sont beaucoup plus minces que représenté. De plus, bien que les couches 24 et 28 soient pratiquement jointives, l'expérience montre que la protection obtenue est tout à fait comparable à celle obtenue classiquement par une couche continue.It will be noted that, contrary to what appears in the figures, there is no apparent discrepancy between the layers of rhodium 28 and gold 24, because they are much thinner than shown. Moreover, although the layers 24 and 28 are practically contiguous, experience shows that the obtained protection is quite comparable to that conventionally obtained by a continuous layer.

Dans le mode de réalisation décrit ci-dessus, le pont est en laiton et les couches formant d'une part la surface du chanfrein, d'autre part les surfaces du pont sont en matériau inerte. Il existe, bien entendu, de nombreuses variantes envisageables. Il est, par exemple, possible d'utiliser un pont réalisé en matériau inerte, en or notamment, de le recouvrir galvaniquement d'un autre matériau inerte tel que le rhodium, puis de former les chanfreins par des opérations de limage et de polissage. Il est également possible de recouvrir complètement le pont en or, puis masquer le chanfrein et éliminer ensuite la couche déposée partout ailleurs que sur le chanfrein.In the embodiment described above, the bridge is made of brass and the layers forming on the one hand the surface of the chamfer, on the other hand the bridge surfaces are made of inert material. There are, of course, many possible variants. It is possible, for example, to use a bridge made of inert material, in particular gold, to cover it galvanically with another inert material such as rhodium, then to form the chamfers by filing and polishing operations. It is also possible to completely cover the gold bridge, then hide the chamfer and then remove the layer deposited anywhere else on the chamfer.

L'invention concerne également une autre variante de procédé de fabrication. Les premières opérations concernant la formation du chanfrein, le nettoyage du pont et le dépôt galvanique du premier matériau inerte, décrites précédemment aux paragraphes [0013] à [0016] restent identiques. Toutefois, si l'on souhaite obtenir un organe dont les faces présentent au final l'aspect du rhodium, le premier matériau inerte déposé selon cette variante est le rhodium.The invention also relates to another variant of the manufacturing method. The first operations concerning the formation of the chamfer, the cleaning of the bridge and the galvanic deposition of the first inert material, previously described in paragraphs [0013] to [0016] remain identical. However, if it is desired to obtain an organ whose faces ultimately have the appearance of rhodium, the first inert material deposited according to this variant is rhodium.

Un matériau de masquage est ensuite déposé sur l'ensemble du pont, recouvrant complètement la pièce. Il peut avantageusement être réalisé au moyen d'un verni commercialisé par la maison Berlach (Suisse) sous la marque « Bernit ® ». Le pont est ensuite séché de manière à durcir le verni, typiquement durant 8 heures à 110°C.A masking material is then deposited on the entire bridge, completely covering the part. It can advantageously be achieved by means of a varnish marketed by Berlach (Switzerland) under the trademark "Bernit ®". The bridge is then dried so as to cure the varnish, typically for 8 hours at 110 ° C.

Le matériau de masquage est ensuite éliminé de la surface du chanfrein. Cette opération se fait par des moyens mécaniques, par exemple au moyen d'un abrasif. Durant cette opération, l'essentiel de la couche du premier matériau inerte est éliminé.The masking material is then removed from the chamfer surface. This operation is done by mechanical means, for example by means of an abrasive. During this operation, most of the layer of the first inert material is removed.

Après avoir été, une nouvelle fois, nettoyé avec soin, le pont subit l'opération de dépôt galvanique du deuxième matériau inerte, par exemple de l'or. Ce dernier se dépose uniquement sur la surface du chanfrein, les autres zones étant couvertes par le matériau de masquage.After being cleaned again with care, the bridge undergoes the galvanic deposition operation of the second inert material, for example gold. The latter is deposited only on the surface of the chamfer, the other areas being covered by the masking material.

Le pont est ensuite trempé dans un bain d'acétone, ce qui a pour effet de dissoudre le matériau de masquage. Le pont obtenu présente ainsi un chanfrein dont la surface est constituée d'un matériau de composition différente du pont et du matériau constitutif des surfaces des faces. On obtient ainsi un filet de couleur différente de la couleur de fond, donnant à la pièce un aspect particulièrement remarquable.The bridge is then dipped in an acetone bath, which has the effect of dissolving the masking material. The resulting bridge thus presents a chamfer whose surface consists of a material of different composition of the bridge and the constituent material of the surfaces of the faces. This gives a net of different color from the background color, giving the piece a particularly remarkable appearance.

Dans une autre variante, tout ou partie des matériaux inertes peut être déposée par PVD (physical vapor deposition). Dans ce cas également, après le dépôt d'une première couche sur l'ensemble du pont, on disposera avantageusement un filet de verni sur le chanfrein préalablement travaillé. Il sera alors possible d'éliminer le surplus comme expliqué ci-dessus, avant d'effectuer le deuxième dépôt, qui couvrira les faces latérale et supérieure.In another variant, all or part of the inert materials can be deposited by PVD (physical vapor deposition). In this case also, after the deposition of a first layer on the entire bridge, it will advantageously have a varnish thread on the chamfer previously worked. It will then be possible to eliminate the surplus as explained above, before making the second deposit, which will cover the sides and top.

Il est également possible d'envisager de déposer une deuxième couche d'épargne sur la face supérieure, après le dépôt de la couche 28, et de déposer une nouvelle couche recouvrant alors la face latérale 18, ainsi que la face inférieure 14. Le pont aurait ainsi des couleurs différentes sur sa face supérieure 16, son chanfrein 20 et sa face latérale 18.It is also possible to consider depositing a second layer of savings on the upper face, after the deposition of the layer 28, and to deposit a new layer then covering the side face 18, as well as the lower face 14. The bridge thus have different colors on its upper face 16, its chamfer 20 and its side face 18.

Il est aussi envisageable de déposer deux couches superposées sur la face supérieure 16, puis d'attaquer localement la couche supérieure par voie chimique, de manière à rendre apparente la couche sous-jacente.It is also conceivable to deposit two superimposed layers on the upper face 16, then to locally attack the upper layer chemically, so as to make apparent the underlying layer.

Les exemples donnés ci-dessus se rapportent à un pont. Il est évident que le même principe peut être appliqué à d'autres pièces du bâti ou de l'ébauche. On considèrera notamment que la cage d'un tourbillon en fait partie.The examples given above relate to a bridge. It is obvious that the same principle can be applied to other parts of the frame or the blank. We particularly consider that the cage of a vortex is one of them.

Claims (8)

Organe de mouvement d'horlogerie (10), comportant au moins deux faces se coupant, notamment une face plane (16) et une face latérale (18), reliées l'une à l'autre au moyen d'un chanfrein (20), caractérisé en ce que le chanfrein (20) présente une surface constituée d'un premier matériau (24) et en ce que lesdites faces (16, 18) de l'organe de part et d'autre du chanfrein (20) présentent une surface constituée d'un au moins deuxième matériau (28) différent du premier matériau (24), lesdits matériaux (24, 28) étant inertes.Watchmaking body (10) comprising at least two intersecting faces, in particular a planar face (16) and a lateral face (18), connected to each other by means of a chamfer (20) , characterized in that the chamfer (20) has a surface constituted by a first material (24) and in that said faces (16, 18) of the member on either side of the chamfer (20) have a surface consisting of at least one second material (28) different from the first material (24), said materials (24, 28) being inert. Organe (10) selon la revendication 1, caractérisé en ce qu'il est formé d'un troisième matériau différent des premier (24) et deuxième (28) matériaux, lesquels forment une couche sur ledit troisième matériau.Body (10) according to claim 1, characterized in that it is formed of a third material different from the first (24) and second (28) materials, which form a layer on said third material. Organe selon la revendication 2, caractérisé en ce que les premier et deuxième matériaux sont l'un de l'or, l'autre du rhodium et le troisième du laiton.An organ according to claim 2, characterized in that the first and second materials are one of gold, the other of rhodium and the third of brass. Organe selon la revendication 1, caractérisé en ce qu'il est formé du matériau inerte constitutif de la surface du chanfrein (20).Body according to claim 1, characterized in that it is formed of the inert material constituting the surface of the chamfer (20). Organe selon la revendication 4, caractérisé en ce que ledit organe est en or.Body according to claim 4, characterized in that said member is gold. Procédé de fabrication d'un organe selon la revendication 1, caractérisé en ce qu'il comporte les étapes suivantes : - formation mécanique dudit chanfrein (20), - dépôt dudit premier matériau (24) inerte sur la surface (16, 18, 20) dudit organe (10), - masquage du chanfrein (20) au moyen d'un matériau de masquage (26), - élimination mécanique du matériau de masquage (26) dans les parties recouvrant les faces (16, 18) de l'organe de part et d'autre du chanfrein (20), - dépôt dudit deuxième matériau inerte (28), et - élimination dudit matériau de masquage (26). A method of manufacturing an organ according to claim 1, characterized in that it comprises the following steps: mechanical formation of said chamfer (20), depositing said first material (24) inert on the surface (16, 18, 20) of said member (10), masking the chamfer (20) by means of a masking material (26), - mechanical removal of the masking material (26) in the portions covering the faces (16, 18) of the member on either side of the chamfer (20), depositing said second inert material (28), and - removal of said masking material (26). Procédé de fabrication d'un organe selon la revendication 1, caractérisé en ce qu'il comporte les étapes suivantes: - formation mécanique dudit chanfrein, - dépôt dudit premier matériau inerte sur la surface dudit organe, - masquage dudit organe au moyen d'un matériau de masquage, - élimination mécanique du matériau de masquage sur le chanfrein, - dépôt dudit deuxième matériau inerte, et - élimination dudit matériau de masquage. A method of manufacturing an organ according to claim 1, characterized in that it comprises the following steps: mechanical formation of said chamfer, depositing said first inert material on the surface of said organ, masking said body by means of a masking material, mechanical removal of the masking material on the chamfer, depositing said second inert material, and - Removal of said masking material. Procédé selon l'une des revendications 6 ou 7, caractérisé en ce que lesdits premier et deuxième matériaux sont l'un de l'or et l'autre du rhodium et en ce que les opérations de dépôt se font par galvanoplastie.Process according to one of Claims 6 or 7, characterized in that the said first and second materials are one of gold and the other of rhodium and in that the deposition operations are carried out by electroplating.
EP07122447A 2006-12-06 2007-12-06 Element for a timepiece movement Withdrawn EP1930792A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH19802006A CH703229B1 (en) 2006-12-06 2006-12-06 Body timepiece.

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EP1930792A2 true EP1930792A2 (en) 2008-06-11
EP1930792A3 EP1930792A3 (en) 2009-07-22

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EP4286963A1 (en) * 2022-06-03 2023-12-06 Manufacture d'Horlogerie Audemars Piguet SA Method for decorating a component for a timepiece

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH217546A (en) * 1940-11-21 1941-10-31 Colomb Henri Anchor watch movement.
CH337792A (en) * 1957-01-24 1959-04-15 Mausli Jules Watch bridge
EP0098795A2 (en) * 1982-07-09 1984-01-18 Montres Rado S.A. Time piece and method of manufacturing the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH217546A (en) * 1940-11-21 1941-10-31 Colomb Henri Anchor watch movement.
CH337792A (en) * 1957-01-24 1959-04-15 Mausli Jules Watch bridge
EP0098795A2 (en) * 1982-07-09 1984-01-18 Montres Rado S.A. Time piece and method of manufacturing the same

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EP1930792A3 (en) 2009-07-22
CH703229B1 (en) 2011-12-15

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