US3688492A - Bezel, crystal and case assembly in a water-proof watch - Google Patents

Bezel, crystal and case assembly in a water-proof watch Download PDF

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Publication number
US3688492A
US3688492A US122892A US3688492DA US3688492A US 3688492 A US3688492 A US 3688492A US 122892 A US122892 A US 122892A US 3688492D A US3688492D A US 3688492DA US 3688492 A US3688492 A US 3688492A
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US
United States
Prior art keywords
watch
bezel
case
crystal
lip
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
US122892A
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English (en)
Inventor
Yakamori Yabana
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 US3688492A publication Critical patent/US3688492A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • ABSTRACT [30] Foreign Application Priority Data A watch case is so designid that its outer surfacerfcan be ground without the ris of damage to that su ace March 10, 1970 Japan ..45/l9736 of the case which engages the bezel.
  • the length of the engaging surface is such that it lies close to or intersects the continuation of the frustoconical surface.
  • the grinder may make contact with and damage the surface which is to engage the bezel.
  • the width of the bezel is sufficiently great as to constitute a substantial fraction of the overall diameter of the watch.
  • the width of the bezel constitutes a disadvantage when it is desired to restrict the size of a watch, which is particularly the case when it is designed for use by women.
  • the present invention relates to a new shape for the bezel, the portion of the case body which engages the bezel and the watch glass which is sealed to the case body by means of a packing and which is held to the packing by the bezel.
  • the change comprises a deepening of the groove in which the bezel is secured by means of the engaging surface, and a shortening of the lip which engages the bezel.
  • a shoulder is provided either on the crystal itself or on a mating annulus by means of which the bezel holds the glass firmly against the case body.
  • the shortening of thelip which requires modification of the shapes of the bezel and the glass, ensures that the engaging surface will not be damaged during the grinding of the frustoconical outer surface of the case body.
  • an object of the present invention is to prevent accidental damage to the engaging surface which holds the bezel during the operation of grinding the case body to shape.
  • Another object of the invention is to provide for decreasing the width of the bezel in the interest of decreasing the overall diameter of the watch.
  • Still another object of the invention is to improve the economics of producing watch case bodies in mass production.
  • FIG. 1 is a partial cross sectional view in an axial plane showing a case body, bezel and watch glass constructed in accordance with the invention.
  • FIG. 2 is a partial cross sectional view in an axial plane showing a watch case of the present invention in which an annulus cemented to the watch glass serves as the sealing member.
  • FIG. 1 shows one method of meeting these requirements.
  • the case body 11 has an outer surface 1 which must be ground as a finishing operation.
  • the case body 11 further has a groove 2 therein, one wall 12 of which constitutes an engaging surface.
  • the lip 3 having the engaging wall 12 is short enough so that it does not protrude into the extension of the frustoconical surface 1.
  • the groove 2 must be deeper than in conventional watch cases, and the lip 3 must be shorter.
  • the bezel 4 must be longer in the axial direction and can be made narrower in the radial direction. The shoulder 7 in the watch crystal 6 is engaged by the shoulder 8 in the bezel 4 and the watch crystal 6 is thereby held firmly and sealingly against the packing 5.
  • FIG. 2 shows a modification of the above design in whichthe watch crystal has a two part construction.
  • 6 is the transparent portion of the watch crystal, but the portion 6 is cemented to the annulus 9 which is urged by the bezel 4 against the packing 5.
  • the transparent face 6 and the annulus 9 may consist either of glass or plastic, but in general it is preferable that both portions of the watch crystal be made of the same material since a difference in the coefficients of expansion might cause impairment of the seal therebetween as a result of temperature cycling.
  • the packing 5 not only provides the water-proof seal between the watch crystal and the case body but in addition serves as a shock absorber, thereby decreasing the likelihood of breakage of the crystal.
  • the location of the packing 5 at the top surface of the lip 3 decreases the height required for the lip, and ensures that the lip will lie well within the extension of the frustoconical surface 1 and that the lip will not be damaged or marred during the grinding of the surface 1.
  • a waterproof watch case comprising a case body having a frustoconical surface with an annular groove therein, an annular lip forming one wall of said groove, said lip lying entirely within the extension of said frustoconical surface and said wall being an engaging surface, a bezel held in a snap fit by said lip at said engaging surface, a watch crystal held by said bezel and an annulus of flexible packing material effecting a waterproof seal between said case body and said watch crystal whereby said frustoconical surface may be ground without danger of grinding said lip and damaging said engaging surface of said lip in the grinding operation.
  • a watch case as defined in claim 1 in which said its periphery and said bezel has a corresponding shoulder, said bezel shoulder engaging said watch crystal shoulder, thereby holding said watch crystal sealingly against said packing.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Electric Clocks (AREA)
US122892A 1970-03-10 1971-03-10 Bezel, crystal and case assembly in a water-proof watch Expired - Lifetime US3688492A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45019736A JPS505590B1 (enrdf_load_stackoverflow) 1970-03-10 1970-03-10

Publications (1)

Publication Number Publication Date
US3688492A true US3688492A (en) 1972-09-05

Family

ID=12007598

Family Applications (1)

Application Number Title Priority Date Filing Date
US122892A Expired - Lifetime US3688492A (en) 1970-03-10 1971-03-10 Bezel, crystal and case assembly in a water-proof watch

Country Status (5)

Country Link
US (1) US3688492A (enrdf_load_stackoverflow)
JP (1) JPS505590B1 (enrdf_load_stackoverflow)
GB (1) GB1318173A (enrdf_load_stackoverflow)
HK (1) HK4577A (enrdf_load_stackoverflow)
MY (1) MY7600218A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858388A (en) * 1973-04-23 1975-01-07 Suwa Seikosha Kk Crystal mounting structure for a water-proof watch
US4322834A (en) * 1978-07-17 1982-03-30 General Watch Co. Ltd. Watch case with interengaging flanged glass and flanged casing ring
US20060256667A1 (en) * 2005-05-11 2006-11-16 Eta Sa Manufacture Horlogere Suisse Watch including means for improving the shock resistance of the crystal
US20090059734A1 (en) * 2007-08-31 2009-03-05 Nike, Inc. Timepiece With Stabilizing Bezel
US20210191333A1 (en) * 2019-12-20 2021-06-24 Rolex Sa Timepiece component for a timepiece case or for a timepiece

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5231397U (enrdf_load_stackoverflow) * 1975-08-25 1977-03-04

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH251699A (fr) * 1945-03-09 1947-11-15 Colomb Henri Boîte étanche pour mouvements d'horlogerie et appareils de mesure.
CH399355A (de) * 1961-01-23 1965-09-15 L P Investment Co Inc Schützen-Auffangvorrichtung für Webstühle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH251699A (fr) * 1945-03-09 1947-11-15 Colomb Henri Boîte étanche pour mouvements d'horlogerie et appareils de mesure.
CH399355A (de) * 1961-01-23 1965-09-15 L P Investment Co Inc Schützen-Auffangvorrichtung für Webstühle

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858388A (en) * 1973-04-23 1975-01-07 Suwa Seikosha Kk Crystal mounting structure for a water-proof watch
US4322834A (en) * 1978-07-17 1982-03-30 General Watch Co. Ltd. Watch case with interengaging flanged glass and flanged casing ring
US20060256667A1 (en) * 2005-05-11 2006-11-16 Eta Sa Manufacture Horlogere Suisse Watch including means for improving the shock resistance of the crystal
US7384189B2 (en) 2005-05-11 2008-06-10 Eta Sa Manufacture Horlogère Suisse Watch including means for improving the shock resistance of the crystal
US20090059734A1 (en) * 2007-08-31 2009-03-05 Nike, Inc. Timepiece With Stabilizing Bezel
US7682070B2 (en) * 2007-08-31 2010-03-23 Nike, Inc. Timepiece with stabilizing bezel
US20100110842A1 (en) * 2007-08-31 2010-05-06 Nike, Inc. Timepiece With Stabilizing Bezel
US8064292B2 (en) 2007-08-31 2011-11-22 Nike, Inc. Timepiece with stabilizing bezel
US20210191333A1 (en) * 2019-12-20 2021-06-24 Rolex Sa Timepiece component for a timepiece case or for a timepiece
US11966199B2 (en) * 2019-12-20 2024-04-23 Rolex Sa Timepiece component for a timepiece case or for a timepiece

Also Published As

Publication number Publication date
HK4577A (en) 1977-02-04
GB1318173A (en) 1973-05-23
MY7600218A (en) 1976-12-31
JPS505590B1 (enrdf_load_stackoverflow) 1975-03-05

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