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GB1391995A - Electric timepieces - Google Patents

Electric timepieces

Info

Publication number
GB1391995A
GB1391995A GB1939972A GB1939972A GB1391995A GB 1391995 A GB1391995 A GB 1391995A GB 1939972 A GB1939972 A GB 1939972A GB 1939972 A GB1939972 A GB 1939972A GB 1391995 A GB1391995 A GB 1391995A
Authority
GB
United Kingdom
Prior art keywords
switch
counters
time
divider
gate
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
Application number
GB1939972A
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.)
Seikosha KK
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 date
Application filed by Seikosha KK filed Critical Seikosha KK
Publication of GB1391995A publication Critical patent/GB1391995A/en
Expired legal-status Critical Current

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

1391995 Watches SEIKO SHA KK 26 April 1972 [27 April 1971] 19399/72 Heading G3T An electronic chronograph comprises an oscillator 1, frequency dividers 2-4, counters 5- 11 which count the divider output, storage latching circuits 12-17 storing the counts of respective counters, and control circuits 46, 51 whereby a display of time of day or elapsed time can be selected. When the watch is indicating time of day, the output of divider 4 at 100 c/s is used, via the counters and latching circuits, to advance l.e.d. displays 29-34 of decimals of seconds, seconds, and minutes, and to light one of hour indicating lamps 35-45. Setting is possible by opening switch 62 in control circuit 56, so that the 100 c/s divider output is supplied to counter 9. For fine setting, switch 61 is opened so that a 10 c/s signal is supplied. The watch may be started at the instant of a time signal by operating start-stop switch 49 to open the input gate of divider 2. For use as a stop-watch, a latch control switch 52 is set to open the input gates of latch circuits 12-17 and the switch 49 is used to start the timing operation, elapsed times of up to sixty minutes being displayed by elements 29-34. The switch 52 may be used to display the time at the end of a stage or lap, the counters continuing to count and changing the displayed time when the switch 52 is actuated once more. The cumulative lap times of a race can thus be shown. The timing operation is finally terminated by actuation of switch 49. For resetting to zero, switch 64 is set to give a HIGH input to NAND gate 67 via gate 65. Since the other input of gate 67 receives a LOW signal via invertor 68, the output of 67 is changed to LOW and the dividers 3, 4 and counters 5-11 are reset. Resetting is inhibited, however, if the gate of divider 2 is open and counting is in progress.
GB1939972A 1971-04-27 1972-04-26 Electric timepieces Expired GB1391995A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1391995A true GB1391995A (en) 1975-04-23

Family

ID=12232542

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1939972A Expired GB1391995A (en) 1971-04-27 1972-04-26 Electric timepieces

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444452A1 (en) * 1978-12-19 1980-07-18 Tatabanyai Szenbanyak DEVICE FOR MEASURING THE PSYCHIC REACTION TIME

Families Citing this family (25)

* 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
JPS52106768A (en) * 1975-04-22 1977-09-07 Casio Comput 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.

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444452A1 (en) * 1978-12-19 1980-07-18 Tatabanyai Szenbanyak DEVICE FOR MEASURING THE PSYCHIC REACTION TIME

Also Published As

Publication number Publication date
US3854277A (en) 1974-12-17
CH612569GA3 (en) 1979-08-15
FR2134574B1 (en) 1976-08-06
DE2220783A1 (en) 1972-12-21
FR2134574A1 (en) 1972-12-08
CH612569B (en)

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee