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JPS5421874A - Electronic wristwatch - Google Patents

Electronic wristwatch

Info

Publication number
JPS5421874A
JPS5421874A JP8679277A JP8679277A JPS5421874A JP S5421874 A JPS5421874 A JP S5421874A JP 8679277 A JP8679277 A JP 8679277A JP 8679277 A JP8679277 A JP 8679277A JP S5421874 A JPS5421874 A JP S5421874A
Authority
JP
Japan
Prior art keywords
electronic wristwatch
overhaul
giving
reliability
increase
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
JP8679277A
Other languages
Japanese (ja)
Inventor
Kiichi Kawamura
Sakio Okazaki
Minoru Hosokawa
Hiroshi Ishii
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 JP8679277A priority Critical patent/JPS5421874A/en
Publication of JPS5421874A publication Critical patent/JPS5421874A/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 increase the reliability and lower consumption by giving an overhaul notice display when the step motor output drops or the load increased so as to make an overhaul at the most rational timing.
JP8679277A 1977-07-20 1977-07-20 Electronic wristwatch Pending JPS5421874A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8679277A JPS5421874A (en) 1977-07-20 1977-07-20 Electronic wristwatch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8679277A JPS5421874A (en) 1977-07-20 1977-07-20 Electronic wristwatch

Publications (1)

Publication Number Publication Date
JPS5421874A true JPS5421874A (en) 1979-02-19

Family

ID=13896616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8679277A Pending JPS5421874A (en) 1977-07-20 1977-07-20 Electronic wristwatch

Country Status (1)

Country Link
JP (1) JPS5421874A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847193U (en) * 1981-09-21 1983-03-30 オリエント時計株式会社 Correction drive circuit with accident display function
JPS5863881A (en) * 1981-10-13 1983-04-15 Seikosha Co Ltd Electronic clock
JPS5866089A (en) * 1981-10-15 1983-04-20 Seikosha Co Ltd Electronic time piece
JPS61289120A (en) * 1985-06-14 1986-12-19 Toray Ind Inc Elastic fiber and production thereof
JPS61289118A (en) * 1985-06-14 1986-12-19 Toray Ind Inc Elastic fiber and production thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847193U (en) * 1981-09-21 1983-03-30 オリエント時計株式会社 Correction drive circuit with accident display function
JPS5863881A (en) * 1981-10-13 1983-04-15 Seikosha Co Ltd Electronic clock
JPS5866089A (en) * 1981-10-15 1983-04-20 Seikosha Co Ltd Electronic time piece
JPS61289120A (en) * 1985-06-14 1986-12-19 Toray Ind Inc Elastic fiber and production thereof
JPS61289118A (en) * 1985-06-14 1986-12-19 Toray Ind Inc Elastic fiber and production thereof

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