CH612569B - ELECTRONIC WATCH USABLE AS A CHRONOGRAPH WATCH AND AS A CLASSIC WATCH. - Google Patents

ELECTRONIC WATCH USABLE AS A CHRONOGRAPH WATCH AND AS A CLASSIC WATCH.

Info

Publication number
CH612569B
CH612569B CH628272A CH628272A CH612569B CH 612569 B CH612569 B CH 612569B CH 628272 A CH628272 A CH 628272A CH 628272 A CH628272 A CH 628272A CH 612569 B CH612569 B CH 612569B
Authority
CH
Switzerland
Prior art keywords
watch
time
counters
timepiece
stop
Prior art date
Application number
CH628272A
Other languages
French (fr)
Other versions
CH612569GA3 (en
Inventor
Toshihide Samejima
Yasuhiro Ooi
Original Assignee
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 of CH612569B publication Critical patent/CH612569B/en
Application filed by Seikosha Kk filed Critical Seikosha Kk
Publication of CH612569GA3 publication Critical patent/CH612569GA3/xx

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G5/00—Setting, i.e. correcting or changing, the time-indication
    • G04G5/02—Setting, i.e. correcting or changing, the time-indication by temporarily changing the number of pulses per unit time, e.g. quick-feed method
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F10/00—Apparatus for measuring unknown time intervals by electric means
    • G04F10/04—Apparatus for measuring unknown time intervals by electric means by counting pulses or half-cycles of an ac
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/08—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques
    • G04G9/10—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques by controlling light sources, e.g. electroluminescent diodes
    • G04G9/107—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques by controlling light sources, e.g. electroluminescent diodes provided with means for displaying at will a time indication or a date or a part thereof

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Clocks (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electromechanical Clocks (AREA)

Abstract

An electronic time-keeping device capable of functioning both as a stop-watch and as a timepiece. A signal generator constructed as a crystal oscillator provides a base frequency that is divided in a plurality of stages of frequency dividers and is then counted by counters that effect a time count displayed visually on a time display. The time count is applied from the counters to display elements through latch circuits constituting storage circuits under control of latch control means when the device functions as a stop watch and through these latch or storage circuits and other counting circuitry handling hour counts when the device functions as a timepiece. A reset unit resets the frequency dividers and the counters but is ineffective on the content of the counting unit consisting of the counters during a time count while the device functions as a stop-watch. A time-adjust unit receives count signals from the counters and generates a time-adjust signal applied to make time adjustments on the content of the counters when the device is used as a timepiece.
CH628272A 1971-04-27 1972-04-27 ELECTRONIC WATCH USABLE AS A CHRONOGRAPH WATCH AND AS A CLASSIC WATCH. CH612569B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2785671 1971-04-27

Publications (2)

Publication Number Publication Date
CH612569B true CH612569B (en)
CH612569GA3 CH612569GA3 (en) 1979-08-15

Family

ID=12232542

Family Applications (1)

Application Number Title Priority Date Filing Date
CH628272A CH612569B (en) 1971-04-27 1972-04-27 ELECTRONIC WATCH USABLE AS A CHRONOGRAPH WATCH AND AS A CLASSIC WATCH.

Country Status (5)

Country Link
US (1) US3854277A (en)
CH (1) CH612569B (en)
DE (1) DE2220783A1 (en)
FR (1) FR2134574B1 (en)
GB (1) GB1391995A (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4953476A (en) * 1972-09-22 1974-05-24
JPS4960264A (en) * 1972-10-09 1974-06-11
AU479499B2 (en) * 1972-10-25 1976-12-17 Aoki And Akira Ishkawa Motono Full electronic car clock with digital display and method of time setting therefor
US4048478A (en) * 1974-06-18 1977-09-13 Kabushiki Kaisha Daini Seikosha Marking apparatus with electronic counters
JPS569672B2 (en) * 1974-09-06 1981-03-03
US3991555A (en) * 1974-09-13 1976-11-16 Hughes Aircraft Company Digital timing circuit for display sequencing in two-digit wristwatch
US4176517A (en) * 1974-09-30 1979-12-04 Citizen Watch Co. Ltd. Integrated circuit for timepiece
JPS6045383B2 (en) * 1974-11-25 1985-10-09 セイコーエプソン株式会社 electronic watch body
US3967098A (en) * 1975-04-14 1976-06-29 Harnagel Gary L Navigation instrument
CH607878B (en) * 1975-04-22 Casio Computer Co Ltd STOPWATCH.
US4010603A (en) * 1975-04-30 1977-03-08 Ensign Electronics, Inc. Time marking chronometer
US4075826A (en) * 1975-05-19 1978-02-28 Hughes Aircraft Company Timing circuit for digital wristwatch
US4084402A (en) * 1975-05-22 1978-04-18 Hughes Aircraft Company Timing circuit for display sequencing in a digital wristwatch
US4184320A (en) * 1975-05-30 1980-01-22 Casio Computer Co., Ltd. Electronic stop watches
US4025774A (en) * 1975-06-16 1977-05-24 American Hospital Supply Corporation Timing apparatus including electronic calculator circuits
US4089159A (en) * 1975-06-23 1978-05-16 Citizen Watch Company Limited Electronic timepiece
JPS5245980A (en) * 1975-10-09 1977-04-12 Seiko Instr & Electronics Ltd Digital electronic watch
JPS5247767A (en) * 1975-10-14 1977-04-15 Seiko Instr & Electronics Ltd Digital alarm watch
US4019313A (en) * 1975-10-17 1977-04-26 Motorola, Inc. Liquid crystal watch module
US4110966A (en) * 1975-12-26 1978-09-05 Casio Computer Co., Ltd. Electronic timepiece with stop watch
JPS52141671A (en) * 1976-05-20 1977-11-26 Sharp Corp Digital display electronic watch with stop watch
US4185452A (en) * 1976-07-08 1980-01-29 Arihiko Ikeda Digital time display system
JPS53143367A (en) * 1977-05-20 1978-12-13 Seiko Instr & Electronics Ltd Electronic watch
US4201041A (en) * 1977-08-05 1980-05-06 Jeco Company Limited Digital electronic timepiece having a time correcting means
CH616552B (en) * 1978-07-13 Berney Sa Jean Claude ELECTRONIC WATCH PART.
HU180536B (en) * 1978-12-19 1983-03-28 Tatabanyai Szenbanyak Reactio timer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585375A (en) * 1969-12-22 1971-06-15 Lear Siegler Inc Aircraft time information system
US3664116A (en) * 1970-04-06 1972-05-23 Gen Electric Digital clock controlled by voltage level of clock reference signal
US3672155A (en) * 1970-05-06 1972-06-27 Hamilton Watch Co Solid state watch
US3646752A (en) * 1970-09-28 1972-03-07 Conveyor Specialties Co Plastic encased metal ribbed flexible conveyor chain

Also Published As

Publication number Publication date
FR2134574B1 (en) 1976-08-06
DE2220783A1 (en) 1972-12-21
GB1391995A (en) 1975-04-23
US3854277A (en) 1974-12-17
FR2134574A1 (en) 1972-12-08
CH612569GA3 (en) 1979-08-15

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