EP0098660A1 - Glace de montre en matière minérale - Google Patents

Glace de montre en matière minérale Download PDF

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Publication number
EP0098660A1
EP0098660A1 EP83200985A EP83200985A EP0098660A1 EP 0098660 A1 EP0098660 A1 EP 0098660A1 EP 83200985 A EP83200985 A EP 83200985A EP 83200985 A EP83200985 A EP 83200985A EP 0098660 A1 EP0098660 A1 EP 0098660A1
Authority
EP
European Patent Office
Prior art keywords
plate
layer
wafer
glass
titanium nitride
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Withdrawn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
EP83200985A
Other languages
German (de)
English (en)
French (fr)
Inventor
Robert Soder
Erich Stettler
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.)
Hans Stettler AG
Original Assignee
Hans Stettler 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 Hans Stettler AG filed Critical Hans Stettler AG
Publication of EP0098660A1 publication Critical patent/EP0098660A1/fr
Withdrawn legal-status Critical Current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
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/004—Watch crystals; Fastening or sealing of crystals; Clock glasses from a material other than glass
    • G04B39/006—Watch crystals; Fastening or sealing of crystals; Clock glasses from a material other than glass out of wear resistant material, e.g. sapphire

Definitions

  • the new ultra-thin quartz resonator electronic movements have, for current diameters of about 25 mm, a total thickness of only 4.5 mm and less. So a cavity with a depth of 4.6 mm is enough to accommodate the movement of the dial and the hands.
  • the present invention relates to a watch crystal in mineral material, characterized in that it is composed of a first plate in transparent mineral material and of a hardness greater than 6 according to the MOSH scale. and a second plate of mineral material, transparent or not, welded to the first plate, with the same contour as the first plate and having a cutout defining with the first plate a cavity capable of receiving an ultra-thin watch movement and its time display means.
  • the strap attachments can be adapted either to the removable bottom or to the intermediate plate.
  • the invention also relates to a method for manufacturing a crystal as defined above, characterized in that the junction zones of the two plates are metallized and that they are welded by means of a welding material for metals. Metallization simultaneously conceals the weld.
  • the single figure in the drawing represents a partial sectional view of a compound glass with its removable bottom.
  • the crystal 1 is constituted by a polished sapphire plate. It is welded to a plate 2 having a cutout 3 defining with the sapphire plate 1 a cavity in which can be housed a movement not shown provided with its dial and its hands.
  • the plate 2 can be made of sapphire, ceramic or metal or other materials which will be specified in the examples which follow.
  • the bottom 4 is formed by a simple very thin metal plate fixed by screws 5 screwed into metal studs 6 embedded in the plate 2. The sealing is ensured by a thin gasket of flexible material 7 or by an elastomeric adhesive material .
  • a circular or rectangular glass or any other shape, bevelled or with a faceted edge, is provided in the area to be welded with a very thin layer of chromium.
  • the thickness of this layer is below the crystallization threshold for chromium, so that it is transparent.
  • On this layer of chrome we deposit, by vacuum evaporation, a gold layer for which the chromium layer constitutes a chemical anchoring layer allowing a very solid fixation of the gold layer.
  • On the gold layer is deposited by evaporation a layer of -nickel which is then reinforced by a galvanic deposition of nickel.
  • the second wafer 2 is also metallized by vacuum evaporation and galvanically, but only for the purpose of allowing welding.
  • the chromium layer can therefore be greater and on this chromium layer can be directly deposited a layer of nickel.
  • the two plates thus prepared are welded with a solder containing silver and giving an extremely solid bond.
  • a metal powder is deposited, composed of 86% molybdenum, 12% manganese and 2% chromium oxide Cr 2 O 3 , which is heated to 1100 °. vs.
  • the metals attach very securely to the surface of the sapphire. Chromium oxide partially diffuses into the crystal network of sapphire, causing a red coloration. The longer the heat treatment, the darker the coloration. The area thus prepared is weldable. By the ruby red coloration the welding area is hidden and there is an aesthetic effect.
  • the surface to be welded of plate 2 made of polycrystalline alumina, quartz or another ceramic material, is treated in the same way as plate 1. The two plates are then welded as in Example 1.
  • a preparation of a liquid containing 50 to 70Z of silver is deposited, sold commercially under the brand (DEMETRON, DEGUSSA) for the creation of conductive paths in the electronic circuits with ceramic substrate, to which was added 0.5 to 10Z of titanium nitride in calibrated powder or in flakes.
  • the preparation gives, after heat treatment, a weldable surface with very good adhesion, but the appearance of the weld visible through the glass is not pleasant.
  • the addition of titanium nitride thanks to the golden color particles takes on a glittery gold appearance, creating an original aesthetic effect.
  • the wafer 2 is metallized by the same process or by another process so as to obtain a weldable zone.
  • the transparent plate 1 can be made of another hard material than sapphire.
  • the wafer 2 it can be made of the same material as the wafer 1, that is to say a transparent material or, for example, the following materials: alumina oxide, translucent, white or tinted, tungsten carbide with or without coating of titanium nitride, silicon carbide, boron or titanium, titanium nitride, cermets, smoked or pure quartz, pink or purple with inclusion of rutile or asbestos, silicates with or without inclusion, opals , jade, nephrite or a weldable metal, for example an alloy containing nickel.
  • a transparent material or, for example, the following materials: alumina oxide, translucent, white or tinted, tungsten carbide with or without coating of titanium nitride, silicon carbide, boron or titanium, titanium nitride, cermets, smoked or pure quartz, pink or purple with inclusion of rutile or asbestos, silicates with or without inclusion, opals , jade, nephrite or
  • the metallization of the transparent sapphire plate can be achieved by means of a metal other than gold, for example with silver, platinum, rhodium, ruthenium, palladium, iridium or chromium tinted or not.
  • Titanium nitride containing titanium carbide also has a metallic appearance like gold and can be deposited by cathodic evaporation of titanium in the presence of nitrogen and traces of organic vapors.
  • the back could be made of a material other than metal, for example sapphire.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Surface Treatment Of Glass (AREA)
  • Joining Of Glass To Other Materials (AREA)
EP83200985A 1982-07-07 1983-07-01 Glace de montre en matière minérale Withdrawn EP0098660A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH413882A CH650375GA3 (enrdf_load_stackoverflow) 1982-07-07 1982-07-07
CH4138/82 1982-07-07

Publications (1)

Publication Number Publication Date
EP0098660A1 true EP0098660A1 (fr) 1984-01-18

Family

ID=4270521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200985A Withdrawn EP0098660A1 (fr) 1982-07-07 1983-07-01 Glace de montre en matière minérale

Country Status (2)

Country Link
EP (1) EP0098660A1 (enrdf_load_stackoverflow)
CH (1) CH650375GA3 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558955A (en) * 1983-04-16 1985-12-17 Rodi & Wienenberger Ag Wrist watch
EP2273325A1 (fr) * 2009-07-10 2011-01-12 Chopard Technologies SA Procédé d'assemblage d'une piece sur un support
EP2565731A3 (en) * 2011-08-29 2015-03-25 Seiko Epson Corporation Cover glass and timepiece

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH622151B (fr) * 1977-07-15 Hans Ulrich Klingenberg Boite de montre.
CH10279A (de) * 1895-08-07 1895-11-30 Thalmann J Wilh Stopfpult für Zahnärzte
GB1338629A (en) * 1970-12-21 1973-11-28 Suwa Seikosha Kk Watch glass
DE3040493A1 (de) * 1980-04-04 1981-10-08 The Babcock & Wilcox Co., 70112 New Orleans, La. Verfahren zum anloeten einer glasflaeche an einer anderen flaeche

Patent Citations (4)

* 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
GB1338629A (en) * 1970-12-21 1973-11-28 Suwa Seikosha Kk Watch glass
CH622151B (fr) * 1977-07-15 Hans Ulrich Klingenberg Boite de montre.
DE3040493A1 (de) * 1980-04-04 1981-10-08 The Babcock & Wilcox Co., 70112 New Orleans, La. Verfahren zum anloeten einer glasflaeche an einer anderen flaeche

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
REVUE EUROPEENE DE L'HORLOGERIE-BIJOUTERIE, no. 3, juillet 1980, page 78 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558955A (en) * 1983-04-16 1985-12-17 Rodi & Wienenberger Ag Wrist watch
EP2273325A1 (fr) * 2009-07-10 2011-01-12 Chopard Technologies SA Procédé d'assemblage d'une piece sur un support
CN101950151A (zh) * 2009-07-10 2011-01-19 萧邦科技公司 用于将零件装配在支架上的方法
EP2444862A3 (fr) * 2009-07-10 2013-04-24 Chopard Technologies SA Procédé de réglage de la position d'une pièce sur un support
EP2565731A3 (en) * 2011-08-29 2015-03-25 Seiko Epson Corporation Cover glass and timepiece

Also Published As

Publication number Publication date
CH650375GA3 (enrdf_load_stackoverflow) 1985-07-31

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19840305

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19851113

RIN1 Information on inventor provided before grant (corrected)

Inventor name: STETTLER, ERICH

Inventor name: SODER, ROBERT