US3785141A - Mechanism for a timepiece having a plurality of time display - Google Patents

Mechanism for a timepiece having a plurality of time display Download PDF

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Publication number
US3785141A
US3785141A US00322493A US32249373A US3785141A US 3785141 A US3785141 A US 3785141A US 00322493 A US00322493 A US 00322493A US 32249373 A US32249373 A US 32249373A US 3785141 A US3785141 A US 3785141A
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US
United States
Prior art keywords
hour
hour wheel
sliding member
spring
saw teeth
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
US00322493A
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English (en)
Inventor
T Ikegami
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
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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 US3785141A publication Critical patent/US3785141A/en
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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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/001—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power
    • 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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/005—Mechanical devices for setting the time indicating means stepwise or on determined values

Definitions

  • ABSTRACT A snap mechanism for a timepiece having a plurality of time displays in which either a first hour wheel or a second hour wheel is provided with saw teeth, and between the first and second hour wheels there are interposed a sliding member having saw teeth which are engaged with the saw teeth on the particular hour wheel and a spring pressing the sliding member so that the saw teeth are in engagement.
  • the first and second hour wheels, sliding member and spring are assembled as a self-contained unit.
  • a conventional click mechanism for a timepiece havin g a plurality of time displays is characterized by a first hour wheel having a number of projections equal to 12 or multiples of 12 and a second hour wheel having a number of recesses equal to 12 or multiples of 12, the hour wheels and parts, such as a dial, having an elastic member interposed therebetween, the click mechanism being adapted to locate said first and second hour wheels relatively.
  • the same number of gears as above are coupled to a first hour wheel and a jumping member fixed to the second hour wheel locates said first and second hour wheel relatively.
  • the first arrangement has the deficiency that since the elastic member engaged with the first and second hour wheels is interposed between them, a member outside the wheels, such as a dial, a gear train, or the like is subjected to a strong load when the hands are driven due to the braking action of said elastic member. Consequently, the mechanism cannot be utilized in a timepiece having a small driving force, such as an electronic timepiece or a womens timepiece. Furthermore, since between one recess and its neighboring recess there exists a portion where the force is balanced, and only a relatively weak click force is transmitted to a winding crown when a projection is located into the neighboring recess and mistaken correction sometimes occurs.
  • a second hour hand to be corrected is moved up and down.
  • the space for the jumping member is very small, the length of the spring may be insufficient, and there are instances in which fatigue is imposed on the spring, and if the spring becomes fatigued, the first hour hand and the second hour hand may be shifted to produce an indicating error;
  • one of the first and second hour wheels may be pressed at an angle in the gap therebetween and cause scarring, stopping, and the like of the hands against the dial face.
  • even if this is prevented there remains the further deficiencies that assembly requires skill and the timepiece will be thick.
  • many other timepieces having a plurality of time displays are known, they are not popular because they are thick, expensive and complicated to use, due to their relatively large number of parts.
  • An object of the invention is to provide a timepiece having a plurality of time displays in which the abovementioned deficiencies are avoided.
  • the timepiece of the invention is characterized in that either a first hour wheel or a second hour wheel is provided with saw teeth and between said first and second hour wheels there are interposed a sliding member and a spring.
  • the sliding member is able to slide up .and
  • FIGURE of the drawing is an exploded view partly in section, of a click or snap mechanism by which plural displays may be relatively adjusted.
  • the mechanism comprises an hour wheel stem 7 fixed to a first hour wheel gear 1. At first hour hand (not shown) is supported by the hour wheel stem 7. An upper ratchet wheel 5 is fixed to a second hour wheel gear 6, the wheel 5 and gear 6 forming a second hour wheel 4. A second hour hand (not shown) is supported by the upper ratchet wheel 5.
  • a sliding member 3 having saw teeth is slidably mounted for up and down movement along a sleeve 9 of the first hour wheel gear 1, said sleeve 9 receiving the stem 7.
  • the member 3 is provided with side recesses 3a which are engaged with inner projections 21; of a ring-shaped ratchet spring 2.
  • the ratchet spring 2 has projecting ends 2a which are fitted in apertures la of the first hour wheel gear 1 and fix the angular position of the sliding member 3 and the first hour wheel gear 1.
  • a first hour wheel is formed by the first hour wheel gear 1, the sliding member 3, the ratchet spring 2 and the hour wheel stem 7.
  • the upper ratchet wheel 5 When the hands are driven in the normal course of operation, the upper ratchet wheel 5 is engaged with the sliding member 3, so the first hour wheel and the second hour wheel 4 drive their hands in' concert.
  • the second hour wheel 4 is rotated by a second hour hand correcting wheel 8 from the outside, using a correcting mechanism.
  • the upper ratchet wheel 5 supporting the second hour hand is prevented from moving upwards by its engagement with the hour wheel stem 7 fixed to the first hour wheel gear 1
  • the upper ratchet wheel 5 is rotated while the sliding member 3 and the ratchet spring 2 move downwards, and is located in the next tooth by the spring force of the ratchet spring 2. The action is repeated until the second hour hand is corrected with respect to the first hour 1 hand.
  • first and second hour wheels are formed as a self-contained unit, a timepiece having a correcting mechanism can be easily reformed for one having a plurality of time displays only by exchanging a few parts. Moreover, since the spring is inserted inside the hour wheel, deformation of the spring at the time of dismantling and assembly is prevented, and the magnitude of the spring force can be stabilized as the parts which affect the spring force are relatively few.
  • An adjustment mechanism for a timepiece having a plurality of time displays comprising first and second hour wheels coaxially mounted in spaced relation, one of said hour wheels being provided with saw teeth, a sliding member interposed between said hour wheels for axial movement in opposite directions, said sliding member having saw teeth engaged with the saw teeth on said one hour wheel, and spring means also interposed between said hour wheels and acting on said sliding member to urge the saw teeth thereof into engagement with the saw teeth on said one hour wheel such that when said one hour wheel is turned relative to the other hour wheel said one hour wheel will move step-by-step as each of the saw teeth of the hour wheel engage successive saw teeth of the sliding member, said spring means undergoing deformation to permit the relative rotation of the hour wheels.
  • a mechanism as claimed in claim 2 wherein the means which couples the sliding member and spring means for common rotation comprises projections on the spring means and recesses in the sliding member receiving said projections.
  • a mechanism as claimed in claim 4 wherein the means which couples the spring means and the other said hour wheel for common rotation comprises projecting end portions on said spring means and apertures in said other hour wheel receiving said projecting end portions.
  • a mechanism as claimed in claim 4 wherein said spring means comprises a spring member of symmetrical construction.
  • a mechanism as claimed in claim 7 comprising a stem secured in said other hour wheel for driving the same in rotation therwith, said one hour wheel being loosely mounted in said stem and rotating therewith as said stem is turned.
  • a mechanism as claimed in claim 8 comprising means coupled to said one hour wheel to rotate the same on said stern and to produce relative rotation between said hour wheels.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US00322493A 1972-01-13 1973-01-10 Mechanism for a timepiece having a plurality of time display Expired - Lifetime US3785141A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972006986U JPS5221084Y2 (hu) 1972-01-13 1972-01-13

Publications (1)

Publication Number Publication Date
US3785141A true US3785141A (en) 1974-01-15

Family

ID=11653472

Family Applications (1)

Application Number Title Priority Date Filing Date
US00322493A Expired - Lifetime US3785141A (en) 1972-01-13 1973-01-10 Mechanism for a timepiece having a plurality of time display

Country Status (5)

Country Link
US (1) US3785141A (hu)
JP (1) JPS5221084Y2 (hu)
CH (2) CH586414B5 (hu)
FR (1) FR2168020B1 (hu)
HK (1) HK42776A (hu)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895485A (en) * 1973-03-06 1975-07-22 Zenith Time Sa Timepiece click device
US4247931A (en) * 1977-06-14 1981-01-27 Seiko Koki Kabushiki Kaisha Slip mechanism for a timepiece
US4382689A (en) * 1979-02-05 1983-05-10 Emhart Industries, Inc. Clutch for a timing mechanism
US4945521A (en) * 1988-09-24 1990-07-31 Iwc International Watch Co. Ag Watch
EP0389732A1 (fr) * 1989-03-30 1990-10-03 PINKO S.r.L. Dispositif d'affichage numérique-analogique pour pièce d'horlogerie
US6688765B2 (en) * 2000-03-31 2004-02-10 Seiko Instruments Inc. Clutch wheel for a timepiece
US20070247978A1 (en) * 2006-04-25 2007-10-25 The Swatch Group Management Services Ag Watch with rotating element
US20100238771A1 (en) * 2009-03-17 2010-09-23 Nivarox-Far S.A. Radial clamping system for a timepiece component
US20100238772A1 (en) * 2009-03-17 2010-09-23 Nivarox-Far S.A. Radial clamping system for a timepiece component
US11409244B2 (en) * 2018-10-24 2022-08-09 Seiko Epson Corporation Timepiece part and timepiece

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018113535B4 (de) * 2018-06-06 2023-03-09 Lange Uhren Gmbh Antriebseinrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611703A (en) * 1969-02-20 1971-10-12 Synchron Sa Watch for indicating time of two geographic zones
US3673790A (en) * 1969-06-23 1972-07-04 Manuf Des Montres Rolex Sa One-hour incremental watch setting device
US3695035A (en) * 1969-10-27 1972-10-03 Omega Brandt & Freres Sa Louis Timepiece movement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611703A (en) * 1969-02-20 1971-10-12 Synchron Sa Watch for indicating time of two geographic zones
US3673790A (en) * 1969-06-23 1972-07-04 Manuf Des Montres Rolex Sa One-hour incremental watch setting device
US3695035A (en) * 1969-10-27 1972-10-03 Omega Brandt & Freres Sa Louis Timepiece movement

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895485A (en) * 1973-03-06 1975-07-22 Zenith Time Sa Timepiece click device
US4247931A (en) * 1977-06-14 1981-01-27 Seiko Koki Kabushiki Kaisha Slip mechanism for a timepiece
US4382689A (en) * 1979-02-05 1983-05-10 Emhart Industries, Inc. Clutch for a timing mechanism
US4945521A (en) * 1988-09-24 1990-07-31 Iwc International Watch Co. Ag Watch
EP0360963B1 (de) * 1988-09-24 1992-11-25 IWC International Watch Co. AG Uhr
EP0389732A1 (fr) * 1989-03-30 1990-10-03 PINKO S.r.L. Dispositif d'affichage numérique-analogique pour pièce d'horlogerie
US6688765B2 (en) * 2000-03-31 2004-02-10 Seiko Instruments Inc. Clutch wheel for a timepiece
US7651259B2 (en) * 2006-04-25 2010-01-26 The Swatch Group Management Services Ag Watch with rotating element
US20070247978A1 (en) * 2006-04-25 2007-10-25 The Swatch Group Management Services Ag Watch with rotating element
US20100238771A1 (en) * 2009-03-17 2010-09-23 Nivarox-Far S.A. Radial clamping system for a timepiece component
US20100238772A1 (en) * 2009-03-17 2010-09-23 Nivarox-Far S.A. Radial clamping system for a timepiece component
US8210740B2 (en) * 2009-03-17 2012-07-03 Nivarox-Far S.A. Radial clamping system for a timepiece component
US8277117B2 (en) * 2009-03-17 2012-10-02 Nivarox-Far S.A. Radial clamping system for a timepiece component
RU2525324C2 (ru) * 2009-03-17 2014-08-10 Ниварокс-Фар С.А. Устройство для радиального зажима детали в часах
RU2525321C2 (ru) * 2009-03-17 2014-08-10 Ниварокс-Фар С.А. Устройство для радиального зажима детали в часах
TWI475342B (zh) * 2009-03-17 2015-03-01 Nivarox Sa 時計組件的徑向夾緊系統
US11409244B2 (en) * 2018-10-24 2022-08-09 Seiko Epson Corporation Timepiece part and timepiece
US11829108B2 (en) 2018-10-24 2023-11-28 Seiko Epson Corporation Timepiece part and timepiece

Also Published As

Publication number Publication date
DE2301773B2 (de) 1976-06-10
HK42776A (en) 1976-07-16
DE2301773A1 (de) 1973-07-26
CH45973A4 (hu) 1976-10-15
CH586414B5 (hu) 1977-03-31
FR2168020A1 (hu) 1973-08-24
FR2168020B1 (hu) 1977-02-04
JPS4884266U (hu) 1973-10-13
JPS5221084Y2 (hu) 1977-05-14

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