CH638075GA3 - - Google Patents

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Publication number
CH638075GA3
CH638075GA3 CH361579A CH361579A CH638075GA3 CH 638075G A3 CH638075G A3 CH 638075GA3 CH 361579 A CH361579 A CH 361579A CH 361579 A CH361579 A CH 361579A CH 638075G A3 CH638075G A3 CH 638075GA3
Authority
CH
Switzerland
Prior art keywords
hand
elapsed time
time measurement
driven
signal
Prior art date
Application number
CH361579A
Other languages
French (fr)
Other versions
CH638075B (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 CH638075B publication Critical patent/CH638075B/en
Application filed filed Critical
Publication of CH638075GA3 publication Critical patent/CH638075GA3/fr

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
    • G04F8/006—Apparatus for measuring unknown time intervals by electromechanical means running only during the time interval to be measured, e.g. stop-watch
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/146—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor incorporating two or more stepping motors or rotors

Abstract

An analog display electronic stopwatch including at least one first hand driven during elapsed time measurement and a secondary hand driven after completion of elapsed time measurement is provided. The first hand indicates an arbitrary unit of elapsed time which is displayed during time measurement and the secondary hand indicates time in a fraction of the arbitrary time units, the secondary hand driven after elapsed time measurement. The stopwatch includes elapsed time measurement circuitry including a memory counter circuit for counting elapsed time in 1/100ths of a second and for providing a signal for driving a second and minute hand during time measurement, a secondary counter for providing a signal for driving a 1/100th second hand after completion of time measurement. The 1/100th second hand is driven to indicate the elapsed time under one second as determined by a coincidence detector for comparing the output of the secondary counter signal and that of the memory counter.
CH361579A 1978-04-17 1979-04-17 ELECTRONIC WATCH WITH ANALOGUE DISPLAY. CH638075B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4497678A JPS54136875A (en) 1978-04-17 1978-04-17 Analog electronic watch

Publications (2)

Publication Number Publication Date
CH638075B CH638075B (en) 1900-01-01
CH638075GA3 true CH638075GA3 (en) 1983-09-15

Family

ID=12706492

Family Applications (1)

Application Number Title Priority Date Filing Date
CH361579A CH638075B (en) 1978-04-17 1979-04-17 ELECTRONIC WATCH WITH ANALOGUE DISPLAY.

Country Status (3)

Country Link
US (1) US4270197A (en)
JP (2) JPS54136875A (en)
CH (1) CH638075B (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396296A (en) * 1978-09-11 1983-08-02 Stodden Michael F Stop watch
CH649189GA3 (en) * 1981-12-28 1985-05-15
GB2124803B (en) * 1982-06-07 1985-12-11 Suwa Seikosha Kk Improvements in or relating to electronic analog timepieces
JPS5917892U (en) * 1982-07-23 1984-02-03 セイコーエプソン株式会社 Pointer display stop watch
JPS5940290A (en) * 1982-08-31 1984-03-05 Seiko Epson Corp Analogue multi-functional clock
CH653846GA3 (en) * 1983-12-06 1986-01-31
CH658567GA3 (en) * 1984-03-28 1986-11-28
CH658765GA3 (en) * 1984-04-03 1986-12-15
JPS60224088A (en) * 1984-04-20 1985-11-08 Citizen Watch Co Ltd Hand type timer
JPS6173085A (en) * 1984-09-18 1986-04-15 Citizen Watch Co Ltd Electronic timepiece with chronograph
US4623261A (en) * 1984-09-26 1986-11-18 Citizen Watch Co., Ltd. Electronic timepiece with a chronograph system
JPS62265587A (en) * 1987-05-01 1987-11-18 Seiko Epson Corp Pointer display stopwatch
EP0997799B1 (en) * 1998-04-21 2009-08-19 Seiko Epson Corporation Device and method for timing
CH704948B1 (en) * 2004-02-17 2012-11-30 Lvmh Swiss Mft Sa Watch electromechanical chronograph retrograde.
CH704775A2 (en) * 2011-04-08 2012-10-15 Richemont Int Sa chronograph mechanism.
JP6328136B2 (en) * 2012-12-21 2018-05-23 ウーテーアー・エス・アー・マニファクチュール・オロロジェール・スイス Temperature compensated chronometer circuit
JP6420965B2 (en) * 2014-04-23 2018-11-07 セイコーエプソン株式会社 Time measuring device
USD757079S1 (en) * 2014-09-02 2016-05-24 Apple Inc. Display screen or portion thereof with graphical user interface

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2190543A (en) * 1934-08-14 1940-02-13 James O Ivie Scoreboard
FR2203108B3 (en) * 1972-10-13 1976-09-03 Grand Cap Cie Sa
JPS5452578A (en) * 1977-10-04 1979-04-25 Seiko Instr & Electronics Ltd Stopwatch

Also Published As

Publication number Publication date
CH638075B (en) 1900-01-01
US4270197A (en) 1981-05-26
JPS54136875A (en) 1979-10-24
JPS61191980A (en) 1986-08-26

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