JPS5345577A - Electronic wristwatch - Google Patents

Electronic wristwatch

Info

Publication number
JPS5345577A
JPS5345577A JP472777A JP472777A JPS5345577A JP S5345577 A JPS5345577 A JP S5345577A JP 472777 A JP472777 A JP 472777A JP 472777 A JP472777 A JP 472777A JP S5345577 A JPS5345577 A JP S5345577A
Authority
JP
Japan
Prior art keywords
electronic wristwatch
small
load
output
electro
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
JP472777A
Other languages
Japanese (ja)
Inventor
Minoru Hosokawa
Kiichi Kawamura
Sakio Okazaki
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 JP472777A priority Critical patent/JPS5345577A/en
Publication of JPS5345577A publication Critical patent/JPS5345577A/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)
  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To achieve the decrease in power of a converting mechanism by controlling the characteristics of a pulse motor through detecting of the loads being applied to its rotor and making the electro-mechanical converting efficiency at the small load and small output higher than the value at the large load and large output.
JP472777A 1977-01-19 1977-01-19 Electronic wristwatch Pending JPS5345577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP472777A JPS5345577A (en) 1977-01-19 1977-01-19 Electronic wristwatch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP472777A JPS5345577A (en) 1977-01-19 1977-01-19 Electronic wristwatch

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP12014676A Division JPS5345575A (en) 1976-10-06 1976-10-06 Electronic wristwatch

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP6328286A Division JPS61221692A (en) 1986-03-20 1986-03-20 Electronic timepiece

Publications (1)

Publication Number Publication Date
JPS5345577A true JPS5345577A (en) 1978-04-24

Family

ID=11591918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP472777A Pending JPS5345577A (en) 1977-01-19 1977-01-19 Electronic wristwatch

Country Status (1)

Country Link
JP (1) JPS5345577A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61170297A (en) * 1985-01-23 1986-07-31 エタ・ソシエテ・アノニム・フアブリツク・デボーシエ Motor unit which can be operated at high speed
JPS63240490A (en) * 1987-11-30 1988-10-06 本田技研工業株式会社 Motorcycle power unit layout structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61170297A (en) * 1985-01-23 1986-07-31 エタ・ソシエテ・アノニム・フアブリツク・デボーシエ Motor unit which can be operated at high speed
JPS63240490A (en) * 1987-11-30 1988-10-06 本田技研工業株式会社 Motorcycle power unit layout structure

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