CH616807GA3 - - Google Patents

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Publication number
CH616807GA3
CH616807GA3 CH745578A CH745578A CH616807GA3 CH 616807G A3 CH616807G A3 CH 616807GA3 CH 745578 A CH745578 A CH 745578A CH 745578 A CH745578 A CH 745578A CH 616807G A3 CH616807G A3 CH 616807GA3
Authority
CH
Switzerland
Prior art keywords
wheel train
day
clockwise direction
month
disc
Prior art date
Application number
CH745578A
Other versions
CH616807B (en
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
Publication of CH616807B publication Critical patent/CH616807B/en
Application filed filed Critical
Priority to CH745578A priority Critical patent/CH616807B/en
Priority to DE2925278A priority patent/DE2925278C3/en
Priority to US06/052,749 priority patent/US4320476A/en
Publication of CH616807GA3 publication Critical patent/CH616807GA3/xx

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C17/00—Indicating the time optically by electric means
    • G04C17/005—Indicating the time optically by electric means by discs
    • G04C17/0058—Indicating the time optically by electric means by discs with date indication
    • G04C17/0066—Indicating the time optically by electric means by discs with date indication electromagnetically driven, e.g. intermittently

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

An electronic watch comprising a device for controlling and driving the day of the month disc, wherein the wheel train supplies the energy necessary for moving the day of the month disc, but does not determine the instant of the jump, which may be initiated at any moment by an electrical signal, independently of the position of the wheel train. The device comprises a mechanism driven by the wheel train and arranged so as to disengage when the moving bodies of the wheel train, controlling the display, turn continuously in clockwise direction and to re-engage when said moving bodies turn in anti-clockwise direction. A control circuit determines, in a portion of the driving cycle in an anti-clockwise direction of rotation with a rapid rate, the jump of the display disc of the day of the month mechanism.
CH745578A 1978-07-10 1978-07-10 ELECTRONIC CLOCK PART WITH A DISC FOR DISPLAYING THE DATE AND AN ANALOGUE DISPLAY OF THE TIME. CH616807B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH745578A CH616807B (en) 1978-07-10 1978-07-10 ELECTRONIC CLOCK PART WITH A DISC FOR DISPLAYING THE DATE AND AN ANALOGUE DISPLAY OF THE TIME.
DE2925278A DE2925278C3 (en) 1978-07-10 1979-06-22 Electronic timepiece with a control and drive device for the date display
US06/052,749 US4320476A (en) 1978-07-10 1979-06-28 Electronic watch with a device for controlling and driving the day of the month

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH745578A CH616807B (en) 1978-07-10 1978-07-10 ELECTRONIC CLOCK PART WITH A DISC FOR DISPLAYING THE DATE AND AN ANALOGUE DISPLAY OF THE TIME.

Publications (2)

Publication Number Publication Date
CH616807B CH616807B (en)
CH616807GA3 true CH616807GA3 (en) 1980-04-30

Family

ID=4325388

Family Applications (1)

Application Number Title Priority Date Filing Date
CH745578A CH616807B (en) 1978-07-10 1978-07-10 ELECTRONIC CLOCK PART WITH A DISC FOR DISPLAYING THE DATE AND AN ANALOGUE DISPLAY OF THE TIME.

Country Status (3)

Country Link
US (1) US4320476A (en)
CH (1) CH616807B (en)
DE (1) DE2925278C3 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3268926D1 (en) * 1981-04-22 1986-03-20 Olympus Optical Co Leap year compensation system
CH649189GA3 (en) * 1981-12-28 1985-05-15
JP3732281B2 (en) * 1996-08-30 2006-01-05 シチズン時計株式会社 Multifunction clock
US6582118B1 (en) * 1997-04-25 2003-06-24 Seiko Instruments Inc. Electronic timepiece having transmission wheel rotational position detecting apparatus
US6088302A (en) * 1997-04-25 2000-07-11 Seiko Instruments Inc. Electronic timepiece
JPH11202060A (en) * 1998-01-09 1999-07-30 Citizen Watch Co Ltd Electronic watch with calendar
JP2935182B1 (en) * 1998-02-13 1999-08-16 セイコーインスツルメンツ株式会社 Electronic clock
DE69806337T2 (en) * 1998-03-05 2003-06-05 Frederic Piguet S.A., Le Brassus Calendar mechanism for clockwork
US6616328B1 (en) * 1999-10-26 2003-09-09 Seiko Instruments Inc. High accuracy timepiece
JP3439671B2 (en) * 1998-10-30 2003-08-25 セイコーインスツルメンツ株式会社 High precision clock
CN1292318C (en) * 2000-11-10 2006-12-27 西铁城时计株式会社 Timer of electric timepiece
JP5682857B2 (en) * 2011-03-28 2015-03-11 カシオ計算機株式会社 Display car drive device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336343B2 (en) * 1972-08-03 1978-10-02
CH599588B5 (en) * 1975-05-16 1978-05-31 Ebauchesfabrik Eta Ag
JPS52111757A (en) * 1976-03-16 1977-09-19 Citizen Watch Co Ltd Electroinc watch
JPS53107611A (en) * 1977-03-01 1978-09-19 Seiko Epson Corp Step motor

Also Published As

Publication number Publication date
DE2925278C3 (en) 1982-02-25
DE2925278A1 (en) 1980-01-24
US4320476A (en) 1982-03-16
CH616807B (en)
DE2925278B2 (en) 1981-06-11

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Legal Events

Date Code Title Description
PL Patent ceased