EP1930792A2 - Organ für eine Uhr - Google Patents

Organ für eine Uhr 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
Authority
EP
European Patent Office
Prior art keywords
chamfer
bridge
masking
inert
gold
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.)
Withdrawn
Application number
EP07122447A
Other languages
English (en)
French (fr)
Other versions
EP1930792A3 (de
Inventor
Patrick Baumgartner
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1930792A2 publication Critical patent/EP1930792A2/de
Publication of EP1930792A3 publication Critical patent/EP1930792A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
EP07122447A 2006-12-06 2007-12-06 Organ für ein Uhrwerk Withdrawn EP1930792A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH19802006A CH703229B1 (fr) 2006-12-06 2006-12-06 Organe pour pièce d'horlogerie.

Publications (2)

Publication Number Publication Date
EP1930792A2 true EP1930792A2 (de) 2008-06-11
EP1930792A3 EP1930792A3 (de) 2009-07-22

Family

ID=38835052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07122447A Withdrawn EP1930792A3 (de) 2006-12-06 2007-12-06 Organ für ein Uhrwerk

Country Status (2)

Country Link
EP (1) EP1930792A3 (de)
CH (1) CH703229B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4286963A1 (de) * 2022-06-03 2023-12-06 Manufacture d'Horlogerie Audemars Piguet SA Verfahren zum verzieren eines bauteils für eine uhr

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH217546A (fr) * 1940-11-21 1941-10-31 Colomb Henri Mouvement de montre à ancre.
CH337792A (fr) * 1957-01-24 1959-04-15 Mausli Jules Pont d'horlogerie
EP0098795A2 (de) * 1982-07-09 1984-01-18 Montres Rado S.A. Uhr und Verfahren zur Herstellung derselben

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH217546A (fr) * 1940-11-21 1941-10-31 Colomb Henri Mouvement de montre à ancre.
CH337792A (fr) * 1957-01-24 1959-04-15 Mausli Jules Pont d'horlogerie
EP0098795A2 (de) * 1982-07-09 1984-01-18 Montres Rado S.A. Uhr und Verfahren zur Herstellung derselben

Also Published As

Publication number Publication date
CH703229B1 (fr) 2011-12-15
EP1930792A3 (de) 2009-07-22

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