JPS54136873A - Solar battery watch - Google Patents

Solar battery watch

Info

Publication number
JPS54136873A
JPS54136873A JP4497778A JP4497778A JPS54136873A JP S54136873 A JPS54136873 A JP S54136873A JP 4497778 A JP4497778 A JP 4497778A JP 4497778 A JP4497778 A JP 4497778A JP S54136873 A JPS54136873 A JP S54136873A
Authority
JP
Japan
Prior art keywords
secondary battery
overcharge
termination
display
battery
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
JP4497778A
Other languages
Japanese (ja)
Inventor
Hiroaki Fujimori
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa 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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP4497778A priority Critical patent/JPS54136873A/en
Publication of JPS54136873A publication Critical patent/JPS54136873A/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
    • G04C10/02—Arrangements of electric power supplies in time pieces the power supply being a radioactive or photovoltaic source

Landscapes

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

Abstract

PURPOSE:To prevent deterioration of secondary battery due to overcharge, sudden charge or the like, by notifying the termination of charging of secondary battery by solar battery. CONSTITUTION:When a secondary battery 2 is charged by a solar battery 1, the termination of charging of the battery 2 is detected by a detection circuit 7 which detects the potential difference between the batteries 1 and 2. As a result, functions consuming large power, such as display of clock function circuit 3, are resumed through the circuit 7, and the termination is notified by sound signal through a speaker 8, different movement of the second hand from the usual movement, flickering of display, or other special means of display. Therefore, overcharge of the secondary battery may be prevented, and the secondary battery may be always kept in a nearly completely charged state. Hence, deterioration of secondary battery due to overcharge or sudden charge may be prevented.
JP4497778A 1978-04-17 1978-04-17 Solar battery watch Pending JPS54136873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4497778A JPS54136873A (en) 1978-04-17 1978-04-17 Solar battery watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4497778A JPS54136873A (en) 1978-04-17 1978-04-17 Solar battery watch

Publications (1)

Publication Number Publication Date
JPS54136873A true JPS54136873A (en) 1979-10-24

Family

ID=12706520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4497778A Pending JPS54136873A (en) 1978-04-17 1978-04-17 Solar battery watch

Country Status (1)

Country Link
JP (1) JPS54136873A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316275A (en) * 1979-06-28 1982-02-16 Kabushiki Kaisha Daini Seikosha Charging control circuit for electronic timepiece
US4320477A (en) * 1980-05-16 1982-03-16 Bulova Watch Co., Inc. Energy system for electronic watch
JPH04236889A (en) * 1991-01-10 1992-08-25 Nitta Moore Co Ltd Pipe fitting

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316275A (en) * 1979-06-28 1982-02-16 Kabushiki Kaisha Daini Seikosha Charging control circuit for electronic timepiece
US4320477A (en) * 1980-05-16 1982-03-16 Bulova Watch Co., Inc. Energy system for electronic watch
JPH04236889A (en) * 1991-01-10 1992-08-25 Nitta Moore Co Ltd Pipe fitting

Similar Documents

Publication Publication Date Title
ES486690A1 (en) Method and device to watch the charged state of an accumulator.
FR2538954B1 (en) RECHARGEABLE BATTERY WITH ANNULAR CHARGING TERMINAL
AU3156677A (en) Battery charging simultaneously from two alternators and regulators
JPS51121365A (en) Electric clock
JPS54139033A (en) Battery*cell charging circuit
FR2343352A1 (en) BATTERY CHARGING INSTALLATION
JPS54136873A (en) Solar battery watch
GB2009489B (en) Method of precharging the negative electrode of a nickel-cadmium alkaline storage cell
JPS6429147A (en) Telephone circuit containing overvoltage protection means
JPS5426678A (en) Charger for solar cell
JPS54136874A (en) Solar battery watch
JPS5516237A (en) Electronic watch
JPS5522154A (en) Electronic watch
JPS5349233A (en) Prevention method for overcharge and overdischarge of secondary battery
JPS5486374A (en) Digital electronic watch
JPS5352160A (en) Solar battery watch
JPS5574481A (en) Electron watch with secondary battery
JPS5522153A (en) Electronic watch
JPS5267673A (en) Battery-driven wrist watch
JPS5346777A (en) Electronic wristwatch
JPS53110026A (en) Condenser charging circuit
JPS53139919A (en) Television receiver with clock
JPS53845A (en) Power source
JPS5380265A (en) Electronic watch having charging structure
JPS54134676A (en) Solar battery watch