JPS57201884A - Clock with battery life alarming function - Google Patents

Clock with battery life alarming function

Info

Publication number
JPS57201884A
JPS57201884A JP8769381A JP8769381A JPS57201884A JP S57201884 A JPS57201884 A JP S57201884A JP 8769381 A JP8769381 A JP 8769381A JP 8769381 A JP8769381 A JP 8769381A JP S57201884 A JPS57201884 A JP S57201884A
Authority
JP
Japan
Prior art keywords
voltage
battery
hand
frequency
battery life
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
JP8769381A
Other languages
Japanese (ja)
Inventor
Yoshihito Owa
Kazunaga Takahashi
Isato Watanabe
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
Priority to JP8769381A priority Critical patent/JPS57201884A/en
Publication of JPS57201884A publication Critical patent/JPS57201884A/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 constitute a clock that the life of battery can be known without the provision of an alarm device newly, by causing an uneven rotation to a second hand moving continously to inform the battery life. CONSTITUTION:When the battery voltage is normal, a motor M is continuously driven and a second hand is continuously run at a constant speed. If the battery voltage is lowered than a preset voltage, an output of a detection circuit A is inverted to 1, and pulses in frequencies f0, f1 and f2 are selectively generated from a terminal b1 of a selection circuit B. Thus, from a driving circuit DR, a driving pulse with voltage V1 and frequency f1, a driving pulse with voltage V0 and frequency f0, and a driving pulse with voltage V2 and frequency f2 are selectively generated and the motor M is driven. Thus, the movement of the second hand is irregular and the battery life is announced. Since the average speed of the second hand is equal to the average speed at normal state, no error for display time can be caused.
JP8769381A 1981-06-08 1981-06-08 Clock with battery life alarming function Pending JPS57201884A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8769381A JPS57201884A (en) 1981-06-08 1981-06-08 Clock with battery life alarming function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8769381A JPS57201884A (en) 1981-06-08 1981-06-08 Clock with battery life alarming function

Publications (1)

Publication Number Publication Date
JPS57201884A true JPS57201884A (en) 1982-12-10

Family

ID=13922001

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8769381A Pending JPS57201884A (en) 1981-06-08 1981-06-08 Clock with battery life alarming function

Country Status (1)

Country Link
JP (1) JPS57201884A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291470A (en) * 1976-01-28 1977-08-01 Citizen Watch Co Ltd Portable electronic clock
JPS5329167A (en) * 1976-08-30 1978-03-18 Seiko Instr & Electronics Ltd Crystal oscillation type watch
JPS54102166A (en) * 1978-01-27 1979-08-11 Seiko Epson Corp Battery life display system in electronic watch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291470A (en) * 1976-01-28 1977-08-01 Citizen Watch Co Ltd Portable electronic clock
JPS5329167A (en) * 1976-08-30 1978-03-18 Seiko Instr & Electronics Ltd Crystal oscillation type watch
JPS54102166A (en) * 1978-01-27 1979-08-11 Seiko Epson Corp Battery life display system in electronic watch

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