EP0066538A1 - Uhrgehäuse - Google Patents

Uhrgehäuse Download PDF

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Publication number
EP0066538A1
EP0066538A1 EP82810210A EP82810210A EP0066538A1 EP 0066538 A1 EP0066538 A1 EP 0066538A1 EP 82810210 A EP82810210 A EP 82810210A EP 82810210 A EP82810210 A EP 82810210A EP 0066538 A1 EP0066538 A1 EP 0066538A1
Authority
EP
European Patent Office
Prior art keywords
watch case
layer
case according
crystal
coating
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.)
Granted
Application number
EP82810210A
Other languages
English (en)
French (fr)
Other versions
EP0066538B1 (de
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/de
Application granted granted Critical
Publication of EP0066538B1 publication Critical patent/EP0066538B1/de
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 it relates more precisely to the assembly of two elements of this case, at least one of which is transparent and visible from the outside of the case.
  • the devices described above do not do not allow to make boxes in which the glass completely covers the upper edge of the middle part, on all 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.
  • one of the essential objects of the invention is to propose means making it possible to actually use a solder material at low temperature as the only means of assembling the crystal on a watch case.
  • a metallic coating with a particular structure.
  • this coating can be defined as the superimposition of at least three levels, some or even all of which can be made of the same material.
  • the first level in contact with the surface of the glass, ensures on the one hand the perfect adhesion of the coating to the glass, and on the other hand the masking of the weld zone.
  • the second level stops the diffusion of the welding material towards the ice.
  • the third level at the interface of the coating and the welding material, on the contrary allows good diffusion of this and ensures the attachment of the weld to the coating.
  • the materials forming the second and the third level, as well as the deposition method are chosen so as to ensure perfect adhesion with the first, and the second level respectively.
  • the assembly carried out results on the one hand from the interdiffusion of the elements of the welding material and from the third level of the coating, which can be excellent and depends only on the choice of these materials, and on the other hand, the adhesion of the different levels of the coating to each other, or to the surface of the glass, and their cohesion.
  • This adhesion can be optimized by a good choice of the deposition methods used.
  • a coating formed from a single material such as, for example, gold or silver, deposited on monocrystalline sapphire by the ion deposition process can, for example, keep very good cohesion over a large area. thickness.
  • the various levels mentioned above are formed respectively by the portion of the single layer in contact with the ice and the welding material as well as by its middle portion sufficiently thick to ensure the diffusion of the welding material is stopped.
  • Another object of the invention is to propose different structures of watch cases whose realization is made possible by this new method of assembly.
  • 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 welding material is meant a fuse filler material capable of being placed in a 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 based on a silver alloy, the melting temperature of which is close to 550 or tin, the melting temperature of which is of the order of 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 portion of the surface of the crystal 1 facing the middle part 2 was firstly provided with a metal coating formed of at least three superposed levels.
  • the first level is formed by a masking layer 4, for example of Gold, Chrome or Nickel, of a thickness less than a few microns approximately.
  • a masking layer 4 for example of Gold, Chrome or Nickel, of a thickness less than a few microns approximately.
  • One of the functions of this layer is to safeguard the aesthetics of the watch case by masking the welding 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 has a second level formed by a stop layer 5 preferably consisting of a thick layer of Chromium less than a few microns 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 was produced by successively spraying on the periphery of the ice metallic layers of Gold, Chromium and Copper with a thickness of 0.5 microns. about each.
  • the solder layer reached a thickness of about 0.1 mm.
  • the surface of the middle part 3 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.
  • the welding material in the pasty state, for example by screen printing, or even at the solid state in the form of threads, flakes, etc.
  • the molten solder material distributes itself uniformly by capillary action 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 bonding.
  • 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.
  • FIG. 3 shows for example the assembly by welding of the glass 1 in a notch 9 of a middle part or of a bezel 2, the layer of welding material 3 being disposed between a portion 7 of the ice slice 1 and the lateral surface 8 of the notch. Due to the good resistance of the assembly, the width of the contact zone, and therefore the depth of the notch, can be limited to the minimum.
  • FIGS. 4 and 5 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 4) or notch (figure 5) 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 6 and 7 show constructions similar to those of Figures 4 and 5, 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 8 and 9 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, whose head 19 is flush with the outer surface of the glass, but whose threaded rod 20 is only screwed 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. 10, 10a, 11 and 11a 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. same on the middle by welding or by any other means.
  • FIGs 12, 12bis, 13 and 13bis constructions of watch cases in which the welding assembly is used to achieve, for decoration or protection purposes, the fixing of transparent decorative elements 24, respectively 25 on the surface of the middle part or of the bezel of the case (FIG. 12) or of the crystal (FIG. 13).
  • FIG. 14 schematically represents a watch case seen from above, the characteristic appearance of which 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 weaker than that necessary to hide the layer of glue in classic watch boxes made by gluing.
  • the smallest dimension L of the layer of welding material, the limits of which are represented by the dotted lines 27, is of the order of 1.5 mm and can even go up to 0.4 mm in a parallel direction. in terms of the surfaces facing the assembled elements. This is mainly due to the excellent strength of the assembly, for which the pull-out force required for separation is of the order of 620 kg per square centimeter of section of the weld layer, parallel to the facing surfaces of the assembled parts.

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)
  • Electric Clocks (AREA)
  • Physical Vapour Deposition (AREA)
  • Laminated Bodies (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Liquid Crystal Substances (AREA)
EP82810210A 1981-05-22 1982-05-17 Uhrgehäuse Expired EP0066538B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=4254183

Family Applications (1)

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

Country Status (7)

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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111449A2 (de) * 1982-12-14 1984-06-20 Montres Rado S.A. Verfahren zur Herstellung eines äusseren Uhrenteils und durch dieses Verfahren hergestelltes Teil
EP0125376A1 (de) * 1983-04-16 1984-11-21 RODI & WIENENBERGER Aktiengesellschaft Armbanduhr
EP0127078A1 (de) * 1983-05-19 1984-12-05 Montres Rado S.A. Uhrengehäuse
EP0168010A1 (de) * 1984-07-12 1986-01-15 Montres Rado S.A. Uhrengehäuse
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
WO2015104252A3 (fr) * 2014-01-07 2015-12-23 Cartier International Ag Procédé de fixation d'une glace sur une boîte de montre

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH666981GA3 (de) * 1987-01-22 1988-09-15
DE59609703D1 (de) * 1996-10-30 2002-10-24 Konrad Damasko Gehäuse für armbanduhren
DE29903203U1 (de) * 1999-02-23 1999-05-20 Damasko, Konrad, 93092 Barbing Gehäuse für Armbanduhren
EP2228693B1 (de) * 2009-03-13 2013-03-13 Bulgari Horlogerie S.A. Befestigungsvorrichtung für Schlagglocken einer Uhr mit Schlagwerk
EP2261757A1 (de) * 2009-06-10 2010-12-15 ETA SA Manufacture Horlogère Suisse Verfahren und Vorrichtung zur Befestigung eines Glases an einem Glasreif
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

Citations (7)

* 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
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 (de) * 1966-10-27 1967-03-31
US3551997A (en) * 1967-10-06 1971-01-05 Rca Corp Methods for electroless plating and for brazing
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5172367A (ja) * 1974-12-19 1976-06-23 Citizen Watch Co Ltd Tokeiyogarasu

Patent Citations (7)

* 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
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 (de) * 1966-10-27 1967-03-31
US3551997A (en) * 1967-10-06 1971-01-05 Rca Corp Methods for electroless plating and for brazing
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

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111449A2 (de) * 1982-12-14 1984-06-20 Montres Rado S.A. Verfahren zur Herstellung eines äusseren Uhrenteils und durch dieses Verfahren hergestelltes Teil
EP0111449A3 (en) * 1982-12-14 1984-07-18 Montres Rado S.A. Method to manufacture an exterior part of a time piece, and part obtained by the same
CH650634GA3 (de) * 1982-12-14 1985-08-15
EP0125376A1 (de) * 1983-04-16 1984-11-21 RODI & WIENENBERGER Aktiengesellschaft Armbanduhr
EP0127078A1 (de) * 1983-05-19 1984-12-05 Montres Rado S.A. Uhrengehäuse
EP0168010A1 (de) * 1984-07-12 1986-01-15 Montres Rado S.A. Uhrengehäuse
JPS6138485A (ja) * 1984-07-12 1986-02-24 モントル・ラドー・ソシエテ・アノニム 腕時計ケース
CH657246GA3 (de) * 1984-07-12 1986-08-29
JPH0435036B2 (de) * 1984-07-12 1992-06-09 Rado Montres Sa
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
WO2015104252A3 (fr) * 2014-01-07 2015-12-23 Cartier International Ag Procédé de fixation d'une glace sur une boîte de montre

Also Published As

Publication number Publication date
KR830010411A (ko) 1983-12-30
US4433921A (en) 1984-02-28
HK26888A (en) 1988-04-22
EP0066538B1 (de) 1986-08-06
CH649435GA3 (de) 1985-05-31
DE3272440D1 (en) 1986-09-11
JPS57198885A (en) 1982-12-06

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