HK10387A - Improvements in or relating to stepping electric motor driven electronic timepieces - Google Patents

Improvements in or relating to stepping electric motor driven electronic timepieces

Info

Publication number
HK10387A
HK10387A HK103/87A HK10387A HK10387A HK 10387 A HK10387 A HK 10387A HK 103/87 A HK103/87 A HK 103/87A HK 10387 A HK10387 A HK 10387A HK 10387 A HK10387 A HK 10387A
Authority
HK
Hong Kong
Prior art keywords
detection
path
coil
resistance
motor driven
Prior art date
Application number
HK103/87A
Other languages
English (en)
Inventor
Masuo Kitano
Jiro Ito
Kenji Sakamoto
Original Assignee
Seiko Epson Corp
Shimauchi Seiki 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
Priority claimed from JP6179081A external-priority patent/JPS57175977A/ja
Priority claimed from JP56185849A external-priority patent/JPS5886480A/ja
Application filed by Seiko Epson Corp, Shimauchi Seiki Kk filed Critical Seiko Epson Corp
Publication of HK10387A publication Critical patent/HK10387A/xx

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)
  • Control Of Stepping Motors (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
HK103/87A 1981-04-23 1987-01-28 Improvements in or relating to stepping electric motor driven electronic timepieces HK10387A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6179081A JPS57175977A (en) 1981-04-23 1981-04-23 Analogue electronic watch
JP56185849A JPS5886480A (ja) 1981-11-19 1981-11-19 アナログ電子時計

Publications (1)

Publication Number Publication Date
HK10387A true HK10387A (en) 1987-02-06

Family

ID=26402870

Family Applications (1)

Application Number Title Priority Date Filing Date
HK103/87A HK10387A (en) 1981-04-23 1987-01-28 Improvements in or relating to stepping electric motor driven electronic timepieces

Country Status (5)

Country Link
CH (1) CH643426B (xx)
DE (1) DE3214543A1 (xx)
GB (1) GB2101367B (xx)
HK (1) HK10387A (xx)
SG (1) SG53286G (xx)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994016365A1 (en) * 1993-01-18 1994-07-21 Seiko Instruments Inc. Electronic timepiece
JP3162652B2 (ja) * 1997-04-25 2001-05-08 セイコーインスツルメンツ株式会社 電子時計
JP4343549B2 (ja) * 2003-02-24 2009-10-14 セイコーインスツル株式会社 ステップモータ制御装置及び電子時計
US11233477B2 (en) 2018-06-07 2022-01-25 Ab Mikroelektronik Gesellschaft Mit Beschraenkter Haftung Method and system for controlling an electric motor and detecting a stall condition

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53132386A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS53132381A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS53132382A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS5643575A (en) * 1979-09-18 1981-04-22 Seiko Instr & Electronics Ltd Electronic clock

Also Published As

Publication number Publication date
DE3214543A1 (de) 1982-11-11
CH643426GA3 (xx) 1984-06-15
DE3214543C2 (xx) 1987-12-03
SG53286G (en) 1988-02-19
GB2101367B (en) 1984-09-05
CH643426B (de)
GB2101367A (en) 1983-01-12

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Legal Events

Date Code Title Description
PE Patent expired