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JPS5353378A - Electronic wristwatch - Google Patents

Electronic wristwatch

Info

Publication number
JPS5353378A
JPS5353378A JP12855176A JP12855176A JPS5353378A JP S5353378 A JPS5353378 A JP S5353378A JP 12855176 A JP12855176 A JP 12855176A JP 12855176 A JP12855176 A JP 12855176A JP S5353378 A JPS5353378 A JP S5353378A
Authority
JP
Japan
Prior art keywords
electronic wristwatch
motor
drive
brake
rotor
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
JP12855176A
Other languages
Japanese (ja)
Inventor
Hiroshi Ishii
Minoru Hosokawa
Kiichi Kawamura
Sakio Okazaki
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 JP12855176A priority Critical patent/JPS5353378A/en
Publication of JPS5353378A publication Critical patent/JPS5353378A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To brake a rotor, prevent fluctuations and drive the motor with low power by cutting off wasteful drive current with a transistor in a bipolar type step motor of an electronic wristwatch.
JP12855176A 1976-10-26 1976-10-26 Electronic wristwatch Pending JPS5353378A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12855176A JPS5353378A (en) 1976-10-26 1976-10-26 Electronic wristwatch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12855176A JPS5353378A (en) 1976-10-26 1976-10-26 Electronic wristwatch

Publications (1)

Publication Number Publication Date
JPS5353378A true JPS5353378A (en) 1978-05-15

Family

ID=14987546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12855176A Pending JPS5353378A (en) 1976-10-26 1976-10-26 Electronic wristwatch

Country Status (1)

Country Link
JP (1) JPS5353378A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6045236A (en) * 1983-08-23 1985-03-11 Canon Inc Original feeding device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6045236A (en) * 1983-08-23 1985-03-11 Canon Inc Original feeding device

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