JPS51138479A - Digital clock with electric source selection circuit for oscilator and frequency divider - Google Patents

Digital clock with electric source selection circuit for oscilator and frequency divider

Info

Publication number
JPS51138479A
JPS51138479A JP51053400A JP5340076A JPS51138479A JP S51138479 A JPS51138479 A JP S51138479A JP 51053400 A JP51053400 A JP 51053400A JP 5340076 A JP5340076 A JP 5340076A JP S51138479 A JPS51138479 A JP S51138479A
Authority
JP
Japan
Prior art keywords
battery
voltage
oscillator
low
selection circuitry
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.)
Pending
Application number
JP51053400A
Other languages
English (en)
Inventor
Ii Moiyaa Nooman
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.)
Raytheon Co
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of JPS51138479A publication Critical patent/JPS51138479A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0023—Visual time or date indication means by light valves in general
    • G04G9/0029—Details
    • G04G9/0035—Details constructional
    • G04G9/0041—Illumination devices
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
    • G04G19/08—Arrangements for preventing voltage drop due to overloading the power supply
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
JP51053400A 1975-05-12 1976-05-12 Digital clock with electric source selection circuit for oscilator and frequency divider Pending JPS51138479A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/576,760 US3968641A (en) 1975-05-12 1975-05-12 Digital watch with oscillator/divider power selection circuitry

Publications (1)

Publication Number Publication Date
JPS51138479A true JPS51138479A (en) 1976-11-30

Family

ID=24305886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51053400A Pending JPS51138479A (en) 1975-05-12 1976-05-12 Digital clock with electric source selection circuit for oscilator and frequency divider

Country Status (7)

Country Link
US (1) US3968641A (ja)
JP (1) JPS51138479A (ja)
CH (1) CH614096B (ja)
DE (1) DE2618863C3 (ja)
FR (1) FR2311343A1 (ja)
GB (1) GB1537137A (ja)
HK (1) HK75579A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54149625U (ja) * 1978-04-11 1979-10-18

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015420A (en) * 1976-05-03 1977-04-05 Hughes Aircraft Company Battery select circuitry and level translator for a digital watch
US4149257A (en) * 1976-06-15 1979-04-10 Citizen Watch Company Limited Alarm watch equipped with electronic calculator
JPS5658746A (en) * 1979-10-19 1981-05-21 Casio Computer Co Ltd Power source supply system
US7004598B2 (en) * 2003-02-18 2006-02-28 Cheerine Development (Hong Kong) Ltd. Flashing light system with power selection
US7067986B2 (en) * 2003-09-15 2006-06-27 Cheerine Development (Hong Kong) Limited Frequency controlled lighting system
US7057354B2 (en) * 2003-09-15 2006-06-06 Cheerine Development (Hong Kong) Limited Frequency controlled lighting system
US7029140B2 (en) * 2003-12-23 2006-04-18 Cheerine Development (Hong Kong) Ltd. Flashing light system with multiple voltages
US7207688B2 (en) * 2005-08-18 2007-04-24 Wong Wai Yuen Interactive shoe light device
KR100656588B1 (ko) * 2006-02-10 2006-12-13 삼성전자주식회사 외장 배터리의 추가 장착에 대한 식별이 용이한 배터리잔량정보의 표시가 가능한 휴대용 단말기 및 그 방법
CN104020662A (zh) * 2014-06-22 2014-09-03 管存忠 一种年误差绝对值小于1秒的电子钟
AU2015414468B2 (en) 2015-11-12 2021-06-17 Razer (Asia-Pacific) Pte. Ltd. Watches

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4895269A (ja) * 1972-03-17 1973-12-06
JPS4959674A (ja) * 1972-10-05 1974-06-10

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881311A (en) * 1971-02-27 1975-05-06 Suwa Seikosha Kk Driving arrangement for passive time indicating devices
US3701249A (en) * 1971-03-12 1972-10-31 Hamilton Watch Co Solid state timepiece with liquid crystal display
US3911665A (en) * 1974-01-14 1975-10-14 Zenith Radio Corp Electronic timepiece having complementary electro-optical and electro-mechanical displays

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4895269A (ja) * 1972-03-17 1973-12-06
JPS4959674A (ja) * 1972-10-05 1974-06-10

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54149625U (ja) * 1978-04-11 1979-10-18

Also Published As

Publication number Publication date
FR2311343A1 (fr) 1976-12-10
GB1537137A (en) 1978-12-29
DE2618863B2 (de) 1977-11-10
CH614096GA3 (ja) 1979-11-15
CH614096B (de)
DE2618863A1 (de) 1976-11-18
DE2618863C3 (de) 1978-06-29
HK75579A (en) 1979-11-02
US3968641A (en) 1976-07-13

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