US3744238A - Rectangular watertight watch case - Google Patents

Rectangular watertight watch case Download PDF

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Publication number
US3744238A
US3744238A US00183384A US3744238DA US3744238A US 3744238 A US3744238 A US 3744238A US 00183384 A US00183384 A US 00183384A US 3744238D A US3744238D A US 3744238DA US 3744238 A US3744238 A US 3744238A
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US
United States
Prior art keywords
watch
case
flange
watertight
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
US00183384A
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English (en)
Inventor
M Hirabayashi
K Miyashita
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 US3744238A publication Critical patent/US3744238A/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
    • G04B37/00—Cases
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/084—Complete encasings for wrist or pocket watches without means for hermetic sealing of winding stem or crown
    • G04B37/086—Complete encasings for wrist or pocket watches without means for hermetic sealing of winding stem or crown for shaped watches
    • 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
    • G04B37/0008—Cases for pocket watches and wrist watches

Definitions

  • Att0rneyBlum, Moscovitz, Friedman & Kaplan 5 7 ABSTRACT A watertight watch case for rectangular watches having a circular threaded aperture in one side thereof dimensioned to receive a circular case back. Gaskets are provided between the watch crystal and said watch case and between portions of the case back and watch case. The watch crystal is engaged against its respective gasket through intermediate members for'med of rigid material positioned between the case back and said watch crystal.
  • a rectangular watertight watch comprising a substantially rectangular watch case formed with a substantially circular threaded aperture in one side thereof; a threaded substantially circular case back dimensioned for receipt within said threaded aperture; a watch crystal received within an aperture in the opposed side of said watch case; a gasket intermediate portions of said watch case and each of said case back and watch crystal for providing a watertight seal therebetween; and at least one intermediate member formed of a rigid material intermediate said case back and watch crystal for engaging said watch crystal against its gasket in response to the displacement of the case back into said threaded aperture.
  • FIG. 1 is a partial cross sectional view showing one embodiment of a prior art watertight rectangular watch case
  • FIGS. 1 and 2 the prior art rectangular watertight watch case depicted is provided with a gasket 4 interposed between the inner case body 1 and outer case body 2 through the watch crystal 3.
  • the arrangement is tightened by means of a spring 5.
  • This type of watch case has several drawbacks.
  • the machining of the rectangular inner case body 1 and the outer case body 2 is extremely delicate, and it is difficult to obtain the precise size relationship required.
  • the tightening structure between the inner case body and the outer case body causes some difficulties.
  • the spring 5 depicted in FIGS. 1 and 2 or the spring 6 depicted in the alternate embodiment of FIG.
  • FIG. 4 still another prior art structure is depicted.
  • O-ring gasket 9 inserted between case back 8 and case body 7, said case body being of rectangular exterior configuration and substantially circular interior configuration.
  • the front of the watch case is provided with a crystal 10 having a substantially rectangular shape on its upper side and a circular form on its inner side which engages the case body by means of a tension ring 11.
  • a subsidiary gasket 12 is provided between the upper flange of the watch case and the watch crystal.
  • a spring 13 is provided for fixing the movement in the watch case, said spring engaging against a case ring 14.
  • the tension ring 11 tends to shift downwards when the glass is pressed from its upper surface, thereby necessitating the provision of the subsidiary gasket 12.
  • the presence of the tension ring 11 makes the structure of the glass 10 relatively complicated, and requires great precision in the dimensions of the peripheral portions of the crystal.
  • FIG. 2 is a plan view of the inner case body of the embodiment of FIG. 1;
  • FIG. 3 is a plan view of another embodiment of the prior art rectangular watertight watch cases
  • FIG. 4 is a partial sectional view of still another embodiment of the prior art watertight watch cases
  • FIG. 5 is a partial sectional view of one embodiment of the watertight watch case according to the invention.
  • FIG. 6 is a plane view from the back showing the watch case of FIG. 5.
  • the case back is threaded and received within a threaded circular aperture within the rectangular case body.
  • the case back is tightened in the axial direction by threading within the aperture to insure watertightness on the rear side.
  • the front side of the watch case is provided with a O-ring gasket 21 inserted between the case body 15 and the watch crystal l8.
  • Said watch crystal is of rectangular form on its-top surface, and is provided with a circular portion which extends below a flange in the top surface of the case body.
  • a glass fitting ring 19 and a case ring 20 formed of rigid material are positioned between the watch crystal and the case back so that the tightening force caused by the threading of the case back into its threaded aperture applies pressure through said glass fitting ring and case ring to said' watch crystal for engaging said watch crystal against gasket 21 to insure a watertight seal.
  • a movement 22 is provided fixed within the case by means of case ring and movement fitting ring 23.
  • the components are readily manufactured without resort to highly sophisticated manufacturing techniques such as are required in the embodiments wherein the inner watch case and the central aperture in the outer watch case are of rectangular cross section.
  • the techniques required for manufacturing the components of the rectangular watertight watch according to the invention are similar to the techniques utilized in connection with the manufacture of circular type wrist watches.
  • a watertight watch comprising a watch case formed with a first circular threaded aperture in one side thereof and a second aperture in an opposed side thereof, said case being formed with a central recess providing communication between said first and second apertures and defining a flange in said case about the periphery of said second aperture; a stepped lip on said watch case defining the periphery of said first aperture; a threaded circular case back dimensioned for receipt within said first threaded aperture; a flange at the exterior face of said case back, said flange extending beyond the threaded surface of said case back; a watch crystal dimensioned to project into said second aperture and formed with a peripheral flange dimensioned to overlap said case flange within said recess first gasket means intermediate said watch case flange and said watch crystal flange for providing a watertight seal therebetween; second gasket means between said stepped lip on said watch case and said flange on said case back for providing a watertight seal therebetween, said flange

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
US00183384A 1970-09-26 1971-09-24 Rectangular watertight watch case Expired - Lifetime US3744238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970094853U JPS557905Y1 (enrdf_load_stackoverflow) 1970-09-26 1970-09-26

Publications (1)

Publication Number Publication Date
US3744238A true US3744238A (en) 1973-07-10

Family

ID=14121575

Family Applications (1)

Application Number Title Priority Date Filing Date
US00183384A Expired - Lifetime US3744238A (en) 1970-09-26 1971-09-24 Rectangular watertight watch case

Country Status (7)

Country Link
US (1) US3744238A (enrdf_load_stackoverflow)
JP (1) JPS557905Y1 (enrdf_load_stackoverflow)
CH (2) CH1402471A4 (enrdf_load_stackoverflow)
DE (1) DE2147859C3 (enrdf_load_stackoverflow)
GB (1) GB1338665A (enrdf_load_stackoverflow)
HK (1) HK5377A (enrdf_load_stackoverflow)
IT (1) IT939421B (enrdf_load_stackoverflow)

Cited By (2)

* 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
US5521889A (en) * 1993-05-28 1996-05-28 Walca Sa Watch having a fluid-tight rotary crystal or crystal-bezel unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716360B1 (fr) 1995-08-30 2001-09-26 Isa Swiss Sa Boíte de montre comportant un boítier évidé et des moyens d'emboítage ainsi que montre muni d'une telle boíte de montre

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2716328A (en) * 1954-08-23 1955-08-30 Dinstman Hyman Square waterproof watch case
CH311862A (fr) * 1953-10-02 1955-12-15 Arthur Pretat & Fils S A R L Montre étanche.
FR1124238A (fr) * 1955-03-31 1956-10-08 Perfectionnements aux boîtiers de montre étanches
FR1126032A (fr) * 1955-05-10 1956-11-13 Francois Miserez Ets Boîtier étanche de montre
DE1076577B (de) * 1953-07-13 1960-02-25 Kollmar & Jourdan A G Wasserdichtes Formuhrgehaeuse
FR1234544A (fr) * 1958-09-09 1960-10-18 Boîte étanche pour montre

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1076577B (de) * 1953-07-13 1960-02-25 Kollmar & Jourdan A G Wasserdichtes Formuhrgehaeuse
CH311862A (fr) * 1953-10-02 1955-12-15 Arthur Pretat & Fils S A R L Montre étanche.
US2716328A (en) * 1954-08-23 1955-08-30 Dinstman Hyman Square waterproof watch case
FR1124238A (fr) * 1955-03-31 1956-10-08 Perfectionnements aux boîtiers de montre étanches
FR1126032A (fr) * 1955-05-10 1956-11-13 Francois Miserez Ets Boîtier étanche de montre
FR1234544A (fr) * 1958-09-09 1960-10-18 Boîte étanche pour montre

Cited By (2)

* 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
US5521889A (en) * 1993-05-28 1996-05-28 Walca Sa Watch having a fluid-tight rotary crystal or crystal-bezel unit

Also Published As

Publication number Publication date
HK5377A (en) 1977-02-04
DE2147859A1 (de) 1972-03-30
DE2147859C3 (de) 1975-04-30
DE2147859B2 (de) 1974-09-12
IT939421B (it) 1973-02-10
CH580295B5 (enrdf_load_stackoverflow) 1976-09-30
GB1338665A (en) 1973-11-28
JPS557905Y1 (enrdf_load_stackoverflow) 1980-02-21
CH1402471A4 (enrdf_load_stackoverflow) 1976-04-30

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