US3831372A - Watertight watchcase - Google Patents

Watertight watchcase Download PDF

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Publication number
US3831372A
US3831372A US00421853A US42185373A US3831372A US 3831372 A US3831372 A US 3831372A US 00421853 A US00421853 A US 00421853A US 42185373 A US42185373 A US 42185373A US 3831372 A US3831372 A US 3831372A
Authority
US
United States
Prior art keywords
ring
watch crystal
watchcase
elastic ring
watertight
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
US00421853A
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English (en)
Inventor
S Isono
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Application granted granted Critical
Publication of US3831372A publication Critical patent/US3831372A/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
    • G04B37/11—Hermetic sealing of openings, joints, passages or slits of the back cover of pocket or wrist 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
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/02—Sealing crystals or glasses

Definitions

  • Another object is to provide a fluidtight watchcase construction in which the restoration forces of deformable seals are compensated and the assembly stabilized to maintain the fluidtightness.
  • a watertight watchcase according to the invention comprises a watch crystal having a fluidtight seal between it and a watch crystal ring circumferentially thereof.
  • a first deformable, highly elastic ring effects the seal therebetween.
  • a bezel is disposed circumferentially of the watch crystal ring and resists the restoration force of the deformable seal.
  • the watch crystal ring is provided with two flange surfaces remote from-the first elastic ring which lie in two planes normal to each other.
  • a second deformable, highly elastic ring or seal is disposed on these surfaces and pressed against them toeffect a fluidtight seal free of adhesives by a circumferential shoulder of a watchcase band.
  • FIG. 1 is a fragmentary cross section view of a prior art watchcase which is fluidtight without the use of adhesives;
  • FIG. 2 is a fragmentary cross section view of a fluidtight watchcase according to the invention.
  • FIG. 3 is a fragmentary cross section view of a fluidtight watchcase according to the invention.
  • FIG. 1 A known fluidtight watchcase construction is illustrated in FIG. 1.
  • the watchcase has a watchcase band A circumferentially of a circumferential flange on a watch crystal ring B which has a shouldercircumferentially of a watch crystal C.
  • a pair of elastic, plastic ring seals or gaskets D and D are disposed between the watch crystal ring and the watchcase band and watch crystal as shown. These gaskets are deformable'and are compressed to effect fluidtight seals without use of adhesives, between the corresponding elements associated therewith.
  • the deformable rings D and D develop restoration forces F and F which are illustrated by arrowslabelled according to the forces.
  • the restoration forces are in opposite directions and tend to break the seals since a tendency to rotate the watch crystal ring B is developed that tends to separate the members and disrupt the fluidtightness.
  • FIG. 2 A first embodiment of a watertight watchcase according to the invention is illustrated in FIG. 2.
  • a watch crystal 1 has a watch crystal ring 2 provided with a circumferential flange 2a defining an annular space 3 jointly with the periphery of the watch crystal 1 in which is disposed a T-shaped highly resilient ring or gasket 4 made of a deformable material, for example synthetic rubber.
  • the gasket 4 provides a fluidtight seal without adhesive between the watch crystal and the watch crystal ring.
  • the watch crystal ring 2 is provided with a second annular flange 2b having a surface in a plane substantially normal to a surface of the body of the watch crystal ring 2 as illustrated.
  • the watchcase has a watchband 5 defining an annular space 6 with a circumferential shoulder thereof and the two flange surfaces of the watch crystal ring 2.
  • a second deformable ring or gasket 7 is disposed within this annular space 6 as illustrated with the shoulder of the watchcase band applying the seal or gasket 7 against the two normal flange surfaces as illustrated and compressing it to provide a second seal without adhesive.
  • This second gasket is highly resilient and has a rectangular configuration.
  • a bezel 8 is disposed circumferentially of the flange 2a of the watch crystal ring 2 as illustrated.
  • the watchcase is provided with a back cover 9 fitting into an annular shoulder of the watchcase band and defining a space therewith within which is received a third deformable watertight gasket or seal 10.
  • the watchcase is provided with a time-setting knob stem as illustrated extending into the watchcase within which watchworks 11 are housed.
  • FIG. 3 A second embodiment of a watertight watchcase embodying the invention is illustrated in FIG. 3.
  • a watch crystal 1 has a watch crystal ring 2 having a flange 2a defining a space circumferentially of the watch crystal 1 in which a highly resilient gasket 4' of rectangular cross section is disposed.
  • a watchcase band 5 is provided with a shoulder circumferentially of two flange surfaces, normal to each other, provided by a second flange 2b of the watch crystal ring 2 defining a space 6 therewith in which is disposed an L-shaped gasket 7' compressed therebetween.
  • the two seals and gaskets provide fluid tight seals with the corresponding elements without use of adhesive in the manner of the embodiment illustrated in FIG. 2.
  • a bezel 8' is likewise provided and applies pressure against the flange 2a on the watchcase band and compensates for the restoration forces of the 2 gaskets 4, 7 hereby tending to maintain the assembled and watertight relationship of the elements as before described.
  • the various gaskets in the watchcases are made of a suitable deformable material such as synthetic rubber or a suitable plastic.
  • the material is highly resilient and has a memory tending to restore the deformed gaskets.
  • a watertight watchcase comprising, a watch crystal, a first deformable highly elastic ring circumferentially of the periphery of said watch crystal, a watch crystal ring circumferentially of said first elastic ring and compressing said first elastic ring against said watch crystal to effect a fluidtight seal free of adhesive between the watch crystal and said watch crystal ring, a bezel circumferentially of said watch crystal ring, said watch crystal ring having circumferential flange surfaces substantially in planes normal to each other and remote fromvsaid first elastic ring, a second deformable highly elastic ring abutting one of said flange surfaces and overlying the other, and a watchcase band having a circumferential shoulder in which said second highly elastic ring is received and compressed against said shoulder and flange surfaces thereby effecting a fluidtight seal between the watch crystal ring and the watchcase band free of adhesive.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electric Clocks (AREA)
  • Gasket Seals (AREA)
US00421853A 1972-12-08 1973-12-05 Watertight watchcase Expired - Lifetime US3831372A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972140386U JPS5241898Y2 (zh) 1972-12-08 1972-12-08

Publications (1)

Publication Number Publication Date
US3831372A true US3831372A (en) 1974-08-27

Family

ID=15267594

Family Applications (1)

Application Number Title Priority Date Filing Date
US00421853A Expired - Lifetime US3831372A (en) 1972-12-08 1973-12-05 Watertight watchcase

Country Status (6)

Country Link
US (1) US3831372A (zh)
JP (1) JPS5241898Y2 (zh)
CH (2) CH586925B5 (zh)
DE (1) DE2360685A1 (zh)
FR (1) FR2209958B1 (zh)
GB (1) GB1411840A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132062A (en) * 1976-04-23 1979-01-02 Kabushiki Kaisha Suwa Seikosha Digital watch case

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56159782U (zh) * 1980-04-28 1981-11-28
FI126264B (en) 2013-09-10 2016-09-15 Suunto Oy Electronic display designed for underwater use
JP7059607B2 (ja) * 2017-12-11 2022-04-26 セイコーエプソン株式会社 回転ベゼル付時計

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467062A (en) * 1947-10-21 1949-04-12 Hamilton Watch Co Watchcase
US3789606A (en) * 1972-11-20 1974-02-05 Seiko Instr & Electronics Watertight watch case

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467062A (en) * 1947-10-21 1949-04-12 Hamilton Watch Co Watchcase
US3789606A (en) * 1972-11-20 1974-02-05 Seiko Instr & Electronics Watertight watch case

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132062A (en) * 1976-04-23 1979-01-02 Kabushiki Kaisha Suwa Seikosha Digital watch case

Also Published As

Publication number Publication date
JPS5241898Y2 (zh) 1977-09-22
CH1722773A4 (zh) 1976-10-29
FR2209958A1 (zh) 1974-07-05
CH586925B5 (zh) 1977-04-15
JPS4994668U (zh) 1974-08-15
DE2360685A1 (de) 1974-06-12
GB1411840A (en) 1975-10-29
FR2209958B1 (zh) 1976-06-25

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