EP0066538B1 - Boîte de montre - Google Patents

Boîte de montre Download PDF

Info

Publication number
EP0066538B1
EP0066538B1 EP82810210A EP82810210A EP0066538B1 EP 0066538 B1 EP0066538 B1 EP 0066538B1 EP 82810210 A EP82810210 A EP 82810210A EP 82810210 A EP82810210 A EP 82810210A EP 0066538 B1 EP0066538 B1 EP 0066538B1
Authority
EP
European Patent Office
Prior art keywords
solder
watch case
layer
coating
case according
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
EP82810210A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0066538A1 (fr
Inventor
Paul Gogniat
Eric Loth
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.)
Rado Uhren AG
Original Assignee
Rado Uhren AG
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 Rado Uhren AG filed Critical Rado Uhren AG
Publication of EP0066538A1 publication Critical patent/EP0066538A1/fr
Application granted granted Critical
Publication of EP0066538B1 publication Critical patent/EP0066538B1/fr
Expired 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
    • G04B37/00—Cases
    • 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
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0076—Decoration of the case and of parts thereof, e.g. as a method of manufacture thereof
    • 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
    • G04B39/002—Watch crystals; Fastening or sealing of crystals; Clock glasses made of glass
    • 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
    • G04B39/02—Sealing crystals or glasses

Definitions

  • the present invention relates to a watch case and more specifically the fixing of two elements of this box, at least one of which is transparent and visible from the outside of the case, such as for example glass.
  • the first element comprises a metallic coating applied to the portion of its surface which comes opposite the metallic layer of solder.
  • This coating comprises, in its portion in contact with the transparent material, a material having affinities with the latter to guarantee the adhesion of the coating on the first element. It further comprises, in its portion in contact with the weld, a material having affinities with the latter to guarantee the adhesion between the coating and the weld.
  • the devices described above do not make it possible to produce boxes in which the crystal completely covers the upper edge of the middle part, on all of its sides, and without being held there by claws, nails, screws or other accessories weighing down the line of the box.
  • the box of the above-mentioned application can only be produced if the middle part and the crystal have similar hardnesses and coefficients of expansion (sapphire on hard metal, plastic on plastic, etc.) so as to avoid deterioration of the adhesive layer during variations in the temperature of the box.
  • Japanese utility model 1 243 579 proposes for example using two different layers of glues, juxtaposed, one of which ensures the strength of the assembly and the other the seal.
  • Swiss patent 582 909 describes constructions in which the solder is applied directly between the wall of the watch case and the surface of the crystal. To ensure the bonding of welding material on the ice, it is indicated that substances such as Zinc or rare earths must be incorporated in this material. Such constructions have never appeared on the market. One can think that they encountered many difficulties as for the long term behavior of the junction welding - ice, certainly lessened by phenomena of oxidation of the welding material. In addition, it is clear that the appearance of such welds, visible through the glass, prohibits their use for quality watches.
  • the materials deposited on the ice are characterized by a very good permeability to the diffusion of the welding material and it is therefore necessary to provide thick layers if it should not appear through the ice.
  • the thick electrochemical deposits produced on mineral glass most certainly do not have sufficient adhesion to guarantee correct resistance to tearing of the ice, if the latter is not retained by other means.
  • US Patent 3,173,201 describes a clock comprising a glass dial, welded by its edge to the box, which edge has a metallic coating whose layer adhering to the glass is chromium and that guaranteeing the adhesion of the weld can be copper, silver or gold.
  • This patent only says that the coating described makes it possible to dissolve and reweld without problem. Because it is by its edge that the glass is welded, the metal coating is practically invisible and therefore does not pose any particular aesthetic problem.
  • British Patent 761,662 describes a method for welding a part made of dielectric material, such as glass or ceramic, to a metal part.
  • the dielectric material comprises in its zone to be welded a metallic coating which comprises in its portion in contact with the dielectric material a material having affinities with the latter, to guarantee the adhesion of the coating to the dielectric material and in its portion in contact with the weld, a material having affinities with the latter to guarantee good resistance of the weld.
  • adhesion with the dielectric material is obtained by a chromium-nickel alloy and with the soldering by a layer of copper or tin. This document also specifies that the coating must not be destroyed by welding or flux during the welding operation.
  • the object of the invention is to produce a watch in which a transparent element of the box such as the crystal is fixed to a metallic element of the box by a weld while retaining in the long term the aesthetic appearance of the watch.
  • the coating comprises a layer impermeable to the metal constituting the weld, to form a barrier preventing its diffusion to the first element.
  • this waterproof layer Thanks to the presence of this waterproof layer, it is thus possible to produce a box on which not only does the glass hold perfectly, but also comprising a metallic coating which gives the box a remarkable aesthetic appearance which is unalterable over time.
  • the characteristics of the coating can be optimized by the choice of the materials which constitute it and the methods for its manufacture.
  • a coating formed from a single material such as, for example, gold or silver, deposited on the monocrystalline sapphire by the ion deposition process can, for example, keep very good cohesion over a large thickness which can thus forming a layer impermeable to the metal constituting the weld.
  • these two metals have affinities with both sapphire and solder, and thus guarantee adhesion with them.
  • the invention therefore makes possible different structures of watch cases which makes it possible to carry out this new method of attachment.
  • the watch case according to the invention comprises at least two assembled elements, one of which, 1, is made of a transparent material and is visible from the outside of the box.
  • the glass which is mounted at the upper part of the middle part 2.
  • the glass 1 and the middle part 2 are assembled by means of a layer of metallic welding material. 3. It will be understood that in the figures the thicknesses of the solder layer, and of the various coating layers deposited on the elements to be assembled have been deliberately exaggerated to facilitate their representation.
  • metallic solder material is meant a fuse filler material capable of being placed in the solid or pasty state between the facing surfaces of the elements to be assembled, of being brought to fusion at a relatively low temperature, below 600 ° C approximately, compatible with the nature of the materials of the parts to be assembled and ensuring a rigid assembly after cooling.
  • soldering or brazing materials are known and are formed for example from a silver alloy, the melting temperature of which is close to 550 ° or tin, whose melting temperature is of the order from 180 ° C to 250 ° C.
  • FIG. 2 a diagrammatic representation has been made of the junction zone between the crystal 1 and the middle part 2.
  • the inner face of the crystal 1, that is to say that facing the middle part 2 was first of all provided with a metallic coating in its periphery.
  • This coating firstly comprises, in its portion in contact with the glass 1, a masking layer 4, for example of gold, chromium or nickel, with a thickness of less than a few microns ( J lm) approximately.
  • a masking layer 4 for example of gold, chromium or nickel, with a thickness of less than a few microns ( J lm) approximately.
  • This layer is to safeguard the aesthetics of the watch case by masking the weld area. It must also ensure perfect adhesion of the coating on the ice. This condition is notably fulfilled when it is deposited by vacuum vaporization, the monocrystalline structure of the ice, when it is made of sapphire promoting adhesion.
  • the coating comprises a stop layer 5 impermeable to the metal constituting the weld, preferably consisting of a layer of chromium a thickness of less than a few microns (pm) deposited over the masking layer 4.
  • This stop layer 5 can itself constitute the masking layer in cases where its color agrees with the general appearance of the box.
  • a watch case in accordance with the invention has been produced by successively spraying on the periphery of the ice metallic layers of Gold, Chromium and Copper with a thickness of 0.5 microns ( ⁇ .m) approximately each.
  • the solder layer reached a thickness of about 0.1 mm.
  • the surface of the middle part 2 could also, if necessary, be coated with a bonding layer or be treated to improve the bond with the solder layer 3.
  • a nickel plating of this surface has proved advantageous for the assembly of '' hard metal elements based on sintered metal carbides for example.
  • solder material in pasty state, for example by screen printing, or even between the facing surfaces of the crystal 1 and the middle part 2.
  • solid state in the form of threads, flakes, etc. it is noted that at the time of heating, the molten solder material is distributed by itself uniformly by capillarity between the surfaces corresponding to assembly, which eliminates the difficulties previously linked to the need for a precise distribution of the adhesive material on the surfaces to be assembled by gluing.
  • the heating is itself carried out in an oven, for example in a controlled atmosphere.
  • the thickness of the joint, after cooling of the welding material will generally be of the order of 0.02 to 0.15 mm.
  • FIGS 3 and 4 illustrate other embodiments of the invention, in which the crystal 1 is assembled to an intermediate ring 10 capable of being itself secured to the middle part of the watch case, for example by a screw (figure 3) or notch (figure 4) mounting.
  • a seal 11 mounted between the walls of the notch 12 of the middle part 13 of the case and a groove 28 of the ring 10.
  • a tension ring 14 driven inside the ring 10 ensures correct holding of the ring in its notch.
  • Figures 5 and 6 show constructions similar to those of Figures 3 and 4, respectively, in which however the outer periphery 15 of the glass exceeds that, 16, of the ring 10, so as to come to rest when the ring is mounted in the middle, against the upper edge 17 of the middle, and to hide it.
  • Figures 7 and 8 illustrate yet other structures, in which an intermediate ring 10 is assembled to a glass 1 of very small thickness, for example between 0.5 and 1 mm.
  • the ring 10 makes it possible to reinforce the glass in the vicinity of the mounting zones in the box.
  • this assembly is carried out by means of a screw 18 which passes through the glass 1 and the ring 10, the head 19 of which comes flush with the external surface of the glass, but whose threaded rod 20 n ' is screwed only in the thickness of the ring, so as to avoid any tension on the glass.
  • the ring will be secured to the middle by means of a screw engaged in the threaded hole 21 of the ring 10.
  • nails 22 very small dimensions which are simply driven out or otherwise held in the ring 10 and passes through the glass 1.
  • FIGS. 9, 9bis, 10 and 10bis show by way of example, still other embodiments, in which the crystal 1 is assembled by welding to decorative elements 23, made of hard metal or sapphire, mounted themselves on the middle by welding or by any other means.
  • FIGs 11, 11bis, 12 and 12bis constructions of watch cases in which the assembly by welding is used to achieve, for decoration or protection purposes, the fixing of transparent decorative elements 24, respectively 25 on the surface of the middle or bezel of the case, (figure 11) or crystal (figure 12).
  • FIG. 13 schematically represents a watch case seen from above, whose characteristic appearance results from the implementation of the assembly process by welding.
  • This watch case has a crystal 1 which extends to the edge of the middle part on which it is welded by means of a layer of solder material hidden by a metallized zone 26.
  • the extent of this metallized zone is much lower than that necessary to hide the layer of glue in classic watch cases made by gluing.
  • the smallest dimension L of the layer of welding material, the limits of which are represented by dotted lines 27, is of the order of 1.5 mm and can even go up to 0.4 mm in one direction. parallel to the plane of the surfaces opposite the assembled elements.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Telephone Function (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Liquid Crystal Substances (AREA)
  • Electric Clocks (AREA)
  • Physical Vapour Deposition (AREA)
EP82810210A 1981-05-22 1982-05-17 Boîte de montre Expired EP0066538B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3355/81 1981-05-22
CH335581A CH649435GA3 (enrdf_load_stackoverflow) 1981-05-22 1981-05-22

Publications (2)

Publication Number Publication Date
EP0066538A1 EP0066538A1 (fr) 1982-12-08
EP0066538B1 true EP0066538B1 (fr) 1986-08-06

Family

ID=4254183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82810210A Expired EP0066538B1 (fr) 1981-05-22 1982-05-17 Boîte de montre

Country Status (7)

Country Link
US (1) US4433921A (enrdf_load_stackoverflow)
EP (1) EP0066538B1 (enrdf_load_stackoverflow)
JP (1) JPS57198885A (enrdf_load_stackoverflow)
KR (1) KR830010411A (enrdf_load_stackoverflow)
CH (1) CH649435GA3 (enrdf_load_stackoverflow)
DE (1) DE3272440D1 (enrdf_load_stackoverflow)
HK (1) HK26888A (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH650634GA3 (enrdf_load_stackoverflow) * 1982-12-14 1985-08-15
EP0125376A1 (de) * 1983-04-16 1984-11-21 RODI & WIENENBERGER Aktiengesellschaft Armbanduhr
CH652270GA3 (enrdf_load_stackoverflow) * 1983-05-19 1985-11-15
CH657246GA3 (enrdf_load_stackoverflow) * 1984-07-12 1986-08-29
CH657742GA3 (en) * 1984-09-04 1986-09-30 Method of producing a decorative relief on a transparent underlying surface, in particular watch glass or clock glass
CH666981GA3 (enrdf_load_stackoverflow) * 1987-01-22 1988-09-15
ATE224555T1 (de) * 1996-10-30 2002-10-15 Konrad Damasko Gehäuse für armbanduhren
DE29903203U1 (de) * 1999-02-23 1999-05-20 Damasko, Konrad, 93092 Barbing Gehäuse für Armbanduhren
EP2228693B1 (fr) * 2009-03-13 2013-03-13 Bulgari Horlogerie S.A. Dispositif de fixation pour timbres d'une montre a sonnerie
EP2261757A1 (fr) * 2009-06-10 2010-12-15 ETA SA Manufacture Horlogère Suisse Procédé et dispositif de fixation d'une glace à une lunette
EP3092531B1 (fr) * 2014-01-07 2023-06-28 Cartier International AG Procédé de fixation d'une glace sur une boîte de montre
US9787345B2 (en) * 2014-03-31 2017-10-10 Apple Inc. Laser welding of transparent and opaque materials
US10200516B2 (en) 2014-08-28 2019-02-05 Apple Inc. Interlocking ceramic and optical members
JP2023092022A (ja) * 2021-12-21 2023-07-03 カシオ計算機株式会社 装身具および時計

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH10279A (de) * 1895-08-07 1895-11-30 Thalmann J Wilh Stopfpult für Zahnärzte
FR688991A (fr) 1930-01-28 1930-09-01 Collecteur d'échappement pour moteurs en étoile
US2597935A (en) 1946-04-22 1952-05-27 Corning Glass Works Cover glass assembly
GB761662A (en) * 1953-08-04 1956-11-21 Vickers Electrical Co Ltd Improvements relating to joints between metal and dielectric materials
US3173201A (en) * 1961-08-23 1965-03-16 James F Motson Method of sealing a glass element within a metal member
BE688991A (enrdf_load_stackoverflow) * 1966-10-27 1967-03-31
US3551997A (en) * 1967-10-06 1971-01-05 Rca Corp Methods for electroless plating and for brazing
JPS4816871U (enrdf_load_stackoverflow) 1971-07-06 1973-02-26
JPS5172367A (ja) * 1974-12-19 1976-06-23 Citizen Watch Co Ltd Tokeiyogarasu
GB1482893A (en) * 1976-03-01 1977-08-17 Chow Man Ning Case for a digital watch
FR2395536A1 (fr) * 1977-06-24 1979-01-19 Maille Raymond Glace pour montre de type monocoque

Also Published As

Publication number Publication date
JPS57198885A (en) 1982-12-06
US4433921A (en) 1984-02-28
EP0066538A1 (fr) 1982-12-08
KR830010411A (ko) 1983-12-30
HK26888A (en) 1988-04-22
CH649435GA3 (enrdf_load_stackoverflow) 1985-05-31
DE3272440D1 (en) 1986-09-11

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