JPS5498660A - Solar battery watch - Google Patents

Solar battery watch

Info

Publication number
JPS5498660A
JPS5498660A JP15360977A JP15360977A JPS5498660A JP S5498660 A JPS5498660 A JP S5498660A JP 15360977 A JP15360977 A JP 15360977A JP 15360977 A JP15360977 A JP 15360977A JP S5498660 A JPS5498660 A JP S5498660A
Authority
JP
Japan
Prior art keywords
battery voltage
current
frequency divider
detecting circuit
voltage detecting
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
JP15360977A
Other languages
Japanese (ja)
Inventor
Makoto Yoshida
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP15360977A priority Critical patent/JPS5498660A/en
Priority to US05/905,615 priority patent/US4240021A/en
Priority to GB20676/78A priority patent/GB1597900A/en
Publication of JPS5498660A publication Critical patent/JPS5498660A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time-pieces
    • G04C10/04—Arrangements of electric power supplies in time-pieces with means for indicating the condition of the power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To improve reliability and make possible semi-permanent use by controlling current supply time to a step motor by providing a battery voltage detecting circuit. CONSTITUTION:An OR gate 13 and a battery voltage detecting circuit 16 are added to the basic elements of a basical crystal watch consisting of a crystal vibrator 7, an oscillating circuit and frequency divider 8, a waveform shaping circuit 9, a 1/2 frequency divider 10, AND gates 11, 12 and current-amplifying inverters 14, 15. Then, when the battery voltage is normal, the coil 17a of a step motor 17 is supplied of current for a fixed period at each second. When the battery is overcharged, the battery voltage detecting circuit 16 actuates to change over the output of the OR gate 13 and cause the ANd gates 11, 12 to transmit the signal of the frequency divider 10 straightly to the current amplifying inverters 14, 15, thus the coil 17a is normally supplied of current until the battery voltage lowers down to a normal value.
JP15360977A 1977-05-20 1977-12-22 Solar battery watch Pending JPS5498660A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP15360977A JPS5498660A (en) 1977-12-22 1977-12-22 Solar battery watch
US05/905,615 US4240021A (en) 1977-05-20 1978-05-12 Solar cell battery charging control system
GB20676/78A GB1597900A (en) 1977-05-20 1978-05-19 Solar cell battery charging control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15360977A JPS5498660A (en) 1977-12-22 1977-12-22 Solar battery watch

Publications (1)

Publication Number Publication Date
JPS5498660A true JPS5498660A (en) 1979-08-03

Family

ID=15566218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15360977A Pending JPS5498660A (en) 1977-05-20 1977-12-22 Solar battery watch

Country Status (1)

Country Link
JP (1) JPS5498660A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57206880A (en) * 1981-06-15 1982-12-18 Matsushita Electric Works Ltd Solar battery clock

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57206880A (en) * 1981-06-15 1982-12-18 Matsushita Electric Works Ltd Solar battery clock

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