GB1425840A - Electronic timepiece - Google Patents

Electronic timepiece

Info

Publication number
GB1425840A
GB1425840A GB5915173A GB5915173A GB1425840A GB 1425840 A GB1425840 A GB 1425840A GB 5915173 A GB5915173 A GB 5915173A GB 5915173 A GB5915173 A GB 5915173A GB 1425840 A GB1425840 A GB 1425840A
Authority
GB
United Kingdom
Prior art keywords
motor
rotor
load
pulse width
current
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.)
Expired
Application number
GB5915173A
Other languages
English (en)
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.)
Suwa Seikosha KK
Original Assignee
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 Suwa Seikosha KK filed Critical Suwa Seikosha KK
Publication of GB1425840A publication Critical patent/GB1425840A/en
Expired 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
    • 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)
GB5915173A 1972-12-22 1973-12-20 Electronic timepiece Expired GB1425840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12892372A JPS5542356B2 (enrdf_load_stackoverflow) 1972-12-22 1972-12-22

Publications (1)

Publication Number Publication Date
GB1425840A true GB1425840A (en) 1976-02-18

Family

ID=14996707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5915173A Expired GB1425840A (en) 1972-12-22 1973-12-20 Electronic timepiece

Country Status (5)

Country Link
US (1) US3855781A (enrdf_load_stackoverflow)
JP (1) JPS5542356B2 (enrdf_load_stackoverflow)
GB (1) GB1425840A (enrdf_load_stackoverflow)
HK (1) HK4678A (enrdf_load_stackoverflow)
MY (1) MY7800077A (enrdf_load_stackoverflow)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010433A (enrdf_load_stackoverflow) * 1973-06-04 1975-02-03
GB1451359A (en) * 1973-11-30 1976-09-29 Citizen Watch Co Ltd Pulse motor driven circuit
JPS50120373A (enrdf_load_stackoverflow) * 1974-03-05 1975-09-20
JPS604666B2 (ja) * 1974-04-04 1985-02-05 セイコーエプソン株式会社 水晶腕時計用変換器
JPS5199077A (ja) * 1975-02-26 1976-09-01 Seiko Instr & Electronics Denshidokeiniokerukudosochi
JPS51123186A (en) * 1975-04-18 1976-10-27 Seiko Instr & Electronics Ltd Electronic watch
JPS525566A (en) * 1975-07-02 1977-01-17 Citizen Watch Co Ltd Electric clock
JPS5243006U (enrdf_load_stackoverflow) * 1975-09-23 1977-03-26
JPS5292560A (en) * 1976-01-29 1977-08-04 Seiko Instr & Electronics Ltd Switch box drive pulse width control circuit for electronic clocks
JPS5312669A (en) * 1976-07-21 1978-02-04 Seiko Instr & Electronics Ltd Hands reversing device of electronic watch
JPS5345575A (en) * 1976-10-06 1978-04-24 Seiko Epson Corp Electronic wristwatch
JPS5389776A (en) * 1977-01-19 1978-08-07 Seiko Epson Corp Electronic wristwatch
JPS53114467A (en) * 1977-03-16 1978-10-05 Seiko Instr & Electronics Ltd Electronic watch
JPS53132385A (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
JPS53136870A (en) * 1977-04-23 1978-11-29 Seiko Instr & Electronics Ltd Electronic watch
JPS53132383A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch circuit
JPS53132384A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS53132380A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS53132386A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
GB2006995B (en) * 1977-09-26 1982-11-17 Citizen Watch Co Ltd Drive system for pulse motor
JPS5482268A (en) * 1977-12-14 1979-06-30 Citizen Watch Co Ltd Electronic watch with alarm
JPS5477169A (en) * 1977-12-02 1979-06-20 Seiko Instr & Electronics Ltd Electronic watch
JPS54133382A (en) * 1978-04-07 1979-10-17 Seiko Epson Corp Crystal wristwatch
CH616045B (fr) * 1978-06-20 Ebauches Sa Procede pour reduire la consommation d'une piece d'horlogerie electronique et piece d'horlogerie electronique mettant en oeuvre ce procede.
US4221111A (en) * 1978-08-15 1980-09-09 Citizen Watch Company Limited Electronic timepiece having a voltage conversion circuit
JPS5921493B2 (ja) * 1978-09-12 1984-05-21 セイコーインスツルメンツ株式会社 時計の輪列負荷測定器
CH629356B (fr) * 1979-06-28 Ebauchesfabrik Eta Ag Montre electronique dont le rouage comporte un mobile de comptage.
DE2937838C2 (de) * 1979-09-19 1986-08-28 Braun Ag, 6000 Frankfurt Verfahren und Anordnung zur Regelung von Drehzahl und Phasenlage bei Synchronmotoren
FR2469037A1 (fr) * 1979-10-31 1981-05-08 Sonceboz Sa Dispositif d'entrainement pour appareil necessitant un entrainement intermittent
JPS57500045A (enrdf_load_stackoverflow) * 1980-01-30 1982-01-07
CH640999B (fr) 1980-08-25 Ebauchesfabrik Eta Ag Procede et dispositif de commande d'une moteur pas a pas de piece d'horlogerie electronique.
JPS5696270A (en) * 1980-11-05 1981-08-04 Citizen Watch Co Ltd Electronic timepiece
CH647383GA3 (enrdf_load_stackoverflow) * 1981-02-04 1985-01-31
JPH0228477Y2 (enrdf_load_stackoverflow) * 1981-07-06 1990-07-31
JPS61135288U (enrdf_load_stackoverflow) * 1985-02-13 1986-08-23
JPH0379469U (enrdf_load_stackoverflow) * 1989-12-05 1991-08-13
US6088302A (en) * 1997-04-25 2000-07-11 Seiko Instruments Inc. Electronic timepiece
CN1132079C (zh) * 1997-04-25 2003-12-24 精工电子有限公司 电子表
US6262554B1 (en) * 1998-09-22 2001-07-17 Seiko Epson Corporation Electronic device and method of controlling the same
DE102012105362A1 (de) * 2012-06-20 2013-12-24 Trinamic Motion Control Gmbh & Co. Kg Verfahren und Schaltungsanordnung zur Ansteuerung eines Schrittmotors
JP7023124B2 (ja) * 2018-01-26 2022-02-21 セイコーインスツル株式会社 ムーブメントおよび時計

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH205066A4 (enrdf_load_stackoverflow) * 1966-02-10 1969-08-15
GB1205753A (en) * 1966-09-09 1970-09-16 Smiths Industries Ltd Horological instruments incorporating electrical oscillation generators
JPS5319944B2 (enrdf_load_stackoverflow) * 1971-09-25 1978-06-23

Also Published As

Publication number Publication date
US3855781A (en) 1974-12-24
JPS4985514A (enrdf_load_stackoverflow) 1974-08-16
HK4678A (en) 1978-01-27
JPS5542356B2 (enrdf_load_stackoverflow) 1980-10-30
MY7800077A (en) 1978-12-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19931219