GB1433201A - Drive systems for electric chromometers - Google Patents

Drive systems for electric chromometers

Info

Publication number
GB1433201A
GB1433201A GB2437473A GB2437473A GB1433201A GB 1433201 A GB1433201 A GB 1433201A GB 2437473 A GB2437473 A GB 2437473A GB 2437473 A GB2437473 A GB 2437473A GB 1433201 A GB1433201 A GB 1433201A
Authority
GB
United Kingdom
Prior art keywords
drive
synchronizing
pulses
pick
transistor
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
GB2437473A
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.)
SUISSE POUR LINDUSTRIE HORLOGE
Original Assignee
SUISSE POUR LINDUSTRIE HORLOGE
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 FR7219305A external-priority patent/FR2186771B1/fr
Priority claimed from FR7234667A external-priority patent/FR2201575B1/fr
Application filed by SUISSE POUR LINDUSTRIE HORLOGE filed Critical SUISSE POUR LINDUSTRIE HORLOGE
Publication of GB1433201A publication Critical patent/GB1433201A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/12—Transversal flux machines

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromechanical Clocks (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Control Of Stepping Motors (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1433201 Electronic timepiece; automatic control systems SOC SUISSE POUR _ L' INDUSTRIE HORLOGERE MANAGEMENT SERVICES SA 22 May 1973 [30 May 1972 29 Sept 1972] 24374/73 Headings G3R and G3T [Also in Division H2] A drive system for a timepiece comprises a permanent magnet rotor electric motor having drive and pick-up stator coils BM, BC, and a synchronizing circuit including a quartz-crystal oscillator 11 and a multi-stage frequency divider 14 controlling a first switching device 15 which in turn controls a second switching device in the circuit of the drive coil. The switching devices may be transistors. The first transistor, preferably an F.E.T., effects a phase comparison of the synchronizing pulses and the pulses from the pick-up coil BC. The second transistor TR is switched off during each synchronizing pulse. The width of the current pulses fed to the drive coils BM 1 BM 2 is thus varied as the rotor speed departs from the synchronous speed.
GB2437473A 1972-05-30 1973-05-22 Drive systems for electric chromometers Expired GB1433201A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7219305A FR2186771B1 (en) 1972-05-30 1972-05-30
FR7234667A FR2201575B1 (en) 1972-09-29 1972-09-29

Publications (1)

Publication Number Publication Date
GB1433201A true GB1433201A (en) 1976-04-22

Family

ID=26217118

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2437473A Expired GB1433201A (en) 1972-05-30 1973-05-22 Drive systems for electric chromometers

Country Status (4)

Country Link
JP (1) JPS4950420A (en)
CH (2) CH604245B5 (en)
DE (1) DE2327242C3 (en)
GB (1) GB1433201A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1237058A1 (en) * 2001-02-28 2002-09-04 Eta SA Fabriques d'Ebauches Usage of a non-magnetic coating for covering parts in a horological movement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1237058A1 (en) * 2001-02-28 2002-09-04 Eta SA Fabriques d'Ebauches Usage of a non-magnetic coating for covering parts in a horological movement
WO2002071159A1 (en) * 2001-02-28 2002-09-12 Eta Sa Manufacture Horlogere Suisse Use of a non-magnetic coating for covering components in a clock movement

Also Published As

Publication number Publication date
CH762773A4 (en) 1977-06-30
CH604245B5 (en) 1978-08-31
DE2327242B2 (en) 1976-05-13
JPS4950420A (en) 1974-05-16
DE2327242C3 (en) 1979-03-15
DE2327242A1 (en) 1973-12-06

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Legal Events

Date Code Title Description
PS Patent sealed