JPS554554A - Analog crystal watch - Google Patents

Analog crystal watch

Info

Publication number
JPS554554A
JPS554554A JP7760878A JP7760878A JPS554554A JP S554554 A JPS554554 A JP S554554A JP 7760878 A JP7760878 A JP 7760878A JP 7760878 A JP7760878 A JP 7760878A JP S554554 A JPS554554 A JP S554554A
Authority
JP
Japan
Prior art keywords
output
gate
battery
hand
voltage
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
JP7760878A
Other languages
Japanese (ja)
Inventor
Masaaki Bandai
Akira Torisawa
Jun Ueda
Shuji Otawa
Katsuhiko Sato
Masaharu Shida
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 Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP7760878A priority Critical patent/JPS554554A/en
Publication of JPS554554A publication Critical patent/JPS554554A/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 let the need of battery exchange to be announced through the movement of the second hand differing from that at the ordinary time by selectively changing over two output pulses by the output of a battery life detecting circuit. CONSTITUTION:A battery life detecting circuit 17 detects voltage drop and is so constituted that its output changes from 0 to 1 when the voltage lowers below a certain level. While the battery voltage is not on the decrease, the output of an AND gate 18 is 0 and the output of afrequency division and a pulse width synthesis circuit 11 goes into the input gate 10 of a step motor driving circuit from an AND gate 19 and OR gate 20 to continue the hand operation so as to flow at 8 steps per second, but when the battery capacity has run out, the second hand makes the irregular step operation of moving 8 steps in 0.5 second and pausing in the remaining 0.5 second.
JP7760878A 1978-06-27 1978-06-27 Analog crystal watch Pending JPS554554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7760878A JPS554554A (en) 1978-06-27 1978-06-27 Analog crystal watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7760878A JPS554554A (en) 1978-06-27 1978-06-27 Analog crystal watch

Publications (1)

Publication Number Publication Date
JPS554554A true JPS554554A (en) 1980-01-14

Family

ID=13638627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7760878A Pending JPS554554A (en) 1978-06-27 1978-06-27 Analog crystal watch

Country Status (1)

Country Link
JP (1) JPS554554A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7032012B1 (en) * 2021-10-13 2022-03-08 則雄 宮内 Analog electronic clock

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7032012B1 (en) * 2021-10-13 2022-03-08 則雄 宮内 Analog electronic clock
WO2023062857A1 (en) * 2021-10-13 2023-04-20 宮内則雄 Analog electronic timepiece

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