US3355875A - Watch case - Google Patents

Watch case Download PDF

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Publication number
US3355875A
US3355875A US508935A US50893565A US3355875A US 3355875 A US3355875 A US 3355875A US 508935 A US508935 A US 508935A US 50893565 A US50893565 A US 50893565A US 3355875 A US3355875 A US 3355875A
Authority
US
United States
Prior art keywords
watch case
wall
ring
watch
case
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
US508935A
Other languages
English (en)
Inventor
Jeanmonod Maurice
Dubois Jean Pierre
Schneider Jean-Claude
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.)
Tissot SA
Original Assignee
Fabrique dHorlogerie CHS Tissot et Fils SA
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 Fabrique dHorlogerie CHS Tissot et Fils SA filed Critical Fabrique dHorlogerie CHS Tissot et Fils SA
Application granted granted Critical
Publication of US3355875A publication Critical patent/US3355875A/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
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
    • G04B37/225—Non-metallic cases
    • 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
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
    • 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
    • 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
    • G04B39/025—Sealing crystals or glasses without special sealing parts

Definitions

  • the present invention relates to a Watch case comprising a side wall of plastic material closed in itself, and a glass having a peripheral heel and removably secured to the said Wall by engagement of the heel at the inside of the wall.
  • the present invention aims to avoid these drawbacks of heretofore known watch c-ases provided with a watch case body of plastic material.
  • Another object of the invention is to realize a watertight watch in which the glass is secured to the case of plastic material by simple means.
  • the watch case according to the present invention is characterized in that the inner face of the wall is provided with Ian annular groove housing a metallic ring closed in itself, said groove extending at such level that the heel of the glass is in contact with said ring when the glass is engaged in said wall.
  • the illustrated watch case I comprises a watch case body 1 of circular shape presenting an annular Wall 2 and which forms as well the bottom as the case band. This piece is destinated to receive a watch movement inserted from the top into the case and resting on an annular shoulder 3 of the watch body case 1.
  • An opening (not shown) radially traversing the wall 2 affords for the securing to the body 1 of a tube for the passage of the winding stem of the movement.
  • the watch case body 1 is closed in its upper part by a glass 4 presenting at its periphery a heel 5, at the inner side of which is engaged a tensioning ring 6 ensuring the tightness of the joint between the glass and the body 1.
  • the heel 5 is resilently engaged Within the wall 2. It presents a lateral outerface 7 of cylindrical shape which extends above of the upper rim of the wall 2, so that the glass 4 may be separated from the body 1 by means of a tool serrating the surface 7 and compressing it radially for disengagement.
  • the heel 5 is in contact with the upper face of an annular metallic element 8, constituted by a slotted ring the outer rim of which is engaged in a groove 9 provided in the inner cylindrical face of the wall 2.
  • This ring 8 is undulated so as to present a certain resiliency in axial direction. It bears against the movement and ,United States Patent C) 3,355,875 Patented Dec. 5, 1967 maintains the latter axially in place while simultaneously ensuring the position of the glass in axial direction.
  • the case body 1 is manufactured by injection according to a known process. However, at the same moment of the injection, a circular ring 10 of rectangular crosssection is placed in the mould in such position that this ring is immerged in the upper part of the annular wall 2, its inner face being on a level with the inner face of said wall.
  • This ring may, for example, be of steel, a material which presents a modulus of elasticity substantially superior to that of any of thermoplastic materials, such as nylon, that may be used for example to manufacture the case 1, or of the acrylic glass which constitutes the glass 4. It results therefrom that the heel of the glass is serrated by the ring 10, which solely supports the radial stresses exerted by the glass onto the case and which ensures a correct position and holding.
  • the tensioning ring 6 thus aiiords for the realization of a water-tight watch case which, since the bottom and the case lband are of one piece, does not present any joint besides that between the tube and the winding stern.
  • the latter may be rendered water-tight by well known usual means.
  • the described watch case may be realized as a pocket watch case or as a wrist-watch case.
  • the case body 1 would be provided with means for securing the wristlet, for example with horns.
  • the described arrangement could also be applied to a Watch case of non-circular shape, for example to a square or rectangular watch case.
  • the case body 1 could also be covered interior-ly or exteriorly with a metallic layer obtained by vaporisation or any other known process.
  • the ring 10 could also be of trapezoidal or of any other sectional shape.
  • the inner face of the ring instead of being cylindrical, could also be slightly truncated.
  • the lateral outer face of the heel of the glass in such a case would have a shape corresponding to that of the inner face of the ring.
  • the inner face of the ring instead of extending on a level with the inner face of the wall 2, the inner face of the ring could also extend so as to slightly project inwardly with respect to the wall portion extending below this ring.
  • This ring could then also form a retaining or hooking element for the glass heel, the lower rim of which instead of being chamfered, would then present a projecting lillet.
  • a watch case having a closed side wall and a transparent cover providing a peripheral flange tightly engaging said wall, said wall being composed of plastic material and having an inner surface containing an intermediately disposed Iannular groove, and a closed metallic annular ring received in said groove and engaging said flange.
  • said metallic ring having an inner face lying flush with said side wall inner surface.
  • tensioning ring is frictionally engaged at the interior of said ange and radially presses said ange against said metallic ring.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
US508935A 1964-12-22 1965-11-22 Watch case Expired - Lifetime US3355875A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1647964A CH427660A (fr) 1964-12-22 1964-12-22 Boîte de montre

Publications (1)

Publication Number Publication Date
US3355875A true US3355875A (en) 1967-12-05

Family

ID=4417742

Family Applications (1)

Application Number Title Priority Date Filing Date
US508935A Expired - Lifetime US3355875A (en) 1964-12-22 1965-11-22 Watch case

Country Status (4)

Country Link
US (1) US3355875A (fr)
CH (1) CH427660A (fr)
DE (1) DE1523741A1 (fr)
GB (1) GB1083159A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453820A (en) * 1966-05-03 1969-07-08 John Simon Fastening of timepiece movement
US4110970A (en) * 1975-11-11 1978-09-05 Citizen Watch Company Limited Water-proof watch case
US4117658A (en) * 1975-09-05 1978-10-03 Kabushiki Kaisha Suwa Seikosha Waterproof watch case
US4206591A (en) * 1977-05-31 1980-06-10 Citizen Watch Co., Ltd. Watchglass fixing structure for timepiece
US4281406A (en) * 1978-11-22 1981-07-28 Citizen Watch Co., Ltd. Water-proof case for digital electronic timepieces

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1350943A (en) * 1970-07-23 1974-04-24 Suwa Seikosha Kk Timepiece case
US8096702B2 (en) 2009-05-28 2012-01-17 The Avalanche Group, Llc Ornament container for watch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1363424A (fr) * 1963-05-03 1964-06-12 Lip Sa Procédé de fabrication de boîtier de montre en matière plastique renforcé
US3959911A (en) * 1975-07-07 1976-06-01 Puckett Ronnie R Light and signal device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1363424A (fr) * 1963-05-03 1964-06-12 Lip Sa Procédé de fabrication de boîtier de montre en matière plastique renforcé
US3959911A (en) * 1975-07-07 1976-06-01 Puckett Ronnie R Light and signal device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453820A (en) * 1966-05-03 1969-07-08 John Simon Fastening of timepiece movement
US4117658A (en) * 1975-09-05 1978-10-03 Kabushiki Kaisha Suwa Seikosha Waterproof watch case
US4110970A (en) * 1975-11-11 1978-09-05 Citizen Watch Company Limited Water-proof watch case
US4206591A (en) * 1977-05-31 1980-06-10 Citizen Watch Co., Ltd. Watchglass fixing structure for timepiece
US4281406A (en) * 1978-11-22 1981-07-28 Citizen Watch Co., Ltd. Water-proof case for digital electronic timepieces

Also Published As

Publication number Publication date
GB1083159A (en) 1967-09-13
CH427660A (fr) 1967-07-14
CH1647964A4 (fr) 1966-08-31
DE1523741A1 (de) 1969-06-12

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