US3676997A - Structure for sealing a watch crystal in a waterproof watch - Google Patents

Structure for sealing a watch crystal in a waterproof watch Download PDF

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Publication number
US3676997A
US3676997A US171871A US3676997DA US3676997A US 3676997 A US3676997 A US 3676997A US 171871 A US171871 A US 171871A US 3676997D A US3676997D A US 3676997DA US 3676997 A US3676997 A US 3676997A
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US
United States
Prior art keywords
gasket
glass
watch
case body
crystal
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 - Lifetime
Application number
US171871A
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English (en)
Inventor
Yoshiaki Fujimori
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.)
Suwa Seikosha KK
Original Assignee
Suwa Seikosha KK
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 Suwa Seikosha KK filed Critical Suwa Seikosha KK
Application granted granted Critical
Publication of US3676997A publication Critical patent/US3676997A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/02—Sealing crystals or glasses

Definitions

  • ABSTRACT A A watch crystal is sealed into a watch by means of an annular Q Foreign Application Priority Data gasket of a relatively hard material such as a synthetic resin or Aug: [7, 1970 Japan ..45/71598 soft metal.
  • the parts comprising the seal are so dimensioned 4 that the crystal seats in the gasket in an interference fit and the [52] US. Cl. ..58/90 R, 58/91 gasket fits in the case body in an interference fit.
  • the gasket which is annular, has a frustoconical interior surface into which the watch crystal can be inserted to form an interference fit.
  • the interior of the case body also has a frustoconical inner surface into which the gasket, holding the watch crystal, can be inserted to form an interference fit.
  • the gasket preferably, is made of a synthetic resin or a soft metal.
  • the watch crystal, the exterior of the gasket and the interior of the case body may be provided with guide surfaces to facilitate assembly. The dimensions of the components can be matched to the hardness of the gasket so that the watch crystal may be of an inorganic glass without encountering the problem of breakage during assembly.
  • an object of the present invention is to provide a structure for sealing a watch glass to a waterproof watch where the structure will have long life.
  • Another object of the invention is to provide a structure for sealing a watch glass to a waterproof watch while eliminating the need for a bezel.
  • a further object of the invention is to provide a structure for sealing a watch crystal to a waterproof watch where the assembly must withstand high pressure.
  • FIG. 1 is a cross sectional view of a gasket in accordance with the present invention
  • a gasket I1 is shown in FIG. 1 prior to assembly.
  • the gasket I1 is essentially L-shaped with lower arm 12 having an inner base 12 which is planar. Angle 6 between peripheral lip 13 and inner base 12' is less than 90 is subject to a further restriction which will be described below.
  • Watch crystal 14 also has a planar base 15 designed to seat against inner base 12 of gasket 11.
  • Angle 6 between the base 15 of watch crystal l4 and periphery 16 of the watch crystal is such that upper arm 17 of gasket 11 is deformed outwardly during insertion of the watch crystal.
  • angle 0 must be larger than angle 6,.
  • Angle 0, may suitably lie in the range of about to and preferably is 9020 The amount by which angle 0, is less than 0 will depend on the hardness and deformability of gasket 1 I.
  • outer surface 18 of upper arm 17 is so shaped that when the watch crystal is inserted in the gasket, outer surface 18 will become cylindrical in shape.
  • angle 0 between inner bottom 21 and inner periphery 22 of case body 19 is made less than 90.
  • the inner periphery 22 of case body 19 is frustoconical and has a minimum diameter in the plane indicated in FIG. 3 by the reference letters xx. As can be seen, the plane of the minimum circle intersects periphery 16 of the watch crystal.
  • watch glass 14 is provided with a guide surface 23
  • gasket 11 is provided with an exterior guide surface 24
  • case body 19 is provided with an interior guide surface 25.
  • inner surface 13 and the exterior surface 17 of gasket 11 be smooth in finish.
  • inner periphery 22 of case body 19 is preferably finished with a buff cloth.
  • the outer surface 18 of gasket 11 can be rendered cylindrical by finishing while deformed by the watch crystal.
  • the plane at its maximum diameter should lie within the lower arm 12, i.e., below the plane of inner base 12.
  • the distance between these two planes is indicated by the reference letter b in FIG. 1 and is not critical.
  • Suitable materials for the gasket 1 l are synthetic resins such as polycarbonate and ABS resin.
  • the gasket may also be made of a soft metal such as copper or silver.
  • the watch crystal may be of inorganic glass and yet the assembly operation can be carried out without breaking said crystal.
  • the structure disclosed herein using a gasket of synthetic resin or soft metal, and with interference fits between watch crystal and gasket and case body provides resistance to the entry of water for long periods of time while eliminating problems of breakage during assembly. Moreover, since the necessity for a bezel is eliminated, the structure is simplified and cost of the final watch is decreased.
  • a structure for sealing a waterproof watch comprising a watch glass having a base perpendicular to the axis of said glass and a periphery making an angle 0 with said base of said glass, and annular gasket having an inner base perpendicular to the axis of said gasket and an inner peripheral lip making an angle 6 with said inner base, where is less than 0, and the dimensions of said glass and said gasket are such that said glass can be seated firmly against the inner base and the inner peripheral lip of said gasket by deforming said gasket outwardly, the outer surface of said gasket being cylindrical when said gasket is deformed by said glass, and a metallic case body having an inner bottom against which said gasket can be firmly seated and a frustoconical inner surface tapering inwardly away from said inner bottom, said inner surface having a circle of minimum diameter dimensioned for receiving said gasket in an interference fit, the plane of said circle of minimum diameter intersecting said periphery of said glass.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
US171871A 1970-08-17 1971-08-16 Structure for sealing a watch crystal in a waterproof watch Expired - Lifetime US3676997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7159870 1970-08-17

Publications (1)

Publication Number Publication Date
US3676997A true US3676997A (en) 1972-07-18

Family

ID=13465244

Family Applications (1)

Application Number Title Priority Date Filing Date
US171871A Expired - Lifetime US3676997A (en) 1970-08-17 1971-08-16 Structure for sealing a watch crystal in a waterproof watch

Country Status (4)

Country Link
US (1) US3676997A (enrdf_load_stackoverflow)
CH (2) CH577207B5 (enrdf_load_stackoverflow)
GB (1) GB1335104A (enrdf_load_stackoverflow)
HK (1) HK5077A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110103199A1 (en) * 2008-06-23 2011-05-05 Omega S.A. Decorative piece made by inlay
JP2025011029A (ja) * 2023-07-10 2025-01-23 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド 防曇デバイス付き保護ガラスを備えた計時器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH254004A (fr) * 1945-05-01 1948-04-15 Vaurillon Emile Boîte étanche.
CH282140A (fr) * 1949-12-03 1952-04-15 Vaurillon Emile Boîte étanche et procédé de fabrication de cette boîte.
DE846977C (de) * 1950-02-13 1952-08-18 Rolex Montres Dichtes Uhrgehaeuse
CH296071A (fr) * 1951-12-18 1954-01-31 Rolex Montres Boîte étanche pour montre.
CH343948A (fr) * 1958-04-25 1959-12-31 Steiner Fils S A J Dispositif de fixation étanche d'un verre de montre à une lunette et procédé de mise en action de ce dispositif

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH254004A (fr) * 1945-05-01 1948-04-15 Vaurillon Emile Boîte étanche.
CH282140A (fr) * 1949-12-03 1952-04-15 Vaurillon Emile Boîte étanche et procédé de fabrication de cette boîte.
DE846977C (de) * 1950-02-13 1952-08-18 Rolex Montres Dichtes Uhrgehaeuse
CH296071A (fr) * 1951-12-18 1954-01-31 Rolex Montres Boîte étanche pour montre.
CH343948A (fr) * 1958-04-25 1959-12-31 Steiner Fils S A J Dispositif de fixation étanche d'un verre de montre à une lunette et procédé de mise en action de ce dispositif

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110103199A1 (en) * 2008-06-23 2011-05-05 Omega S.A. Decorative piece made by inlay
US8540419B2 (en) * 2008-06-23 2013-09-24 Omega S.A. Decorative piece made by inlay
TWI473727B (zh) * 2008-06-23 2015-02-21 Omega Sa Omega Ag Omega Ltd 藉鑲嵌形成的裝飾片
JP2025011029A (ja) * 2023-07-10 2025-01-23 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド 防曇デバイス付き保護ガラスを備えた計時器
JP7703745B2 (ja) 2023-07-10 2025-07-07 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド 防曇デバイス付き保護ガラスを備えた計時器

Also Published As

Publication number Publication date
CH577207B5 (enrdf_load_stackoverflow) 1976-06-30
CH1202571A4 (enrdf_load_stackoverflow) 1976-01-30
GB1335104A (en) 1973-10-24
HK5077A (en) 1977-02-04

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