CH654170GA3 - - Google Patents

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Publication number
CH654170GA3
CH654170GA3 CH454983A CH454983A CH654170GA3 CH 654170G A3 CH654170G A3 CH 654170GA3 CH 454983 A CH454983 A CH 454983A CH 454983 A CH454983 A CH 454983A CH 654170G A3 CH654170G A3 CH 654170GA3
Authority
CH
Switzerland
Prior art keywords
stepping motor
control circuit
electrode
electrect
electret
Prior art date
Application number
CH454983A
Other languages
French (fr)
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 filed Critical
Priority to CH454983A priority Critical patent/CH654170GA3/fr
Priority to EP84903049A priority patent/EP0153934A1/en
Priority to PCT/CH1984/000133 priority patent/WO1985001130A1/en
Publication of CH654170GA3 publication Critical patent/CH654170GA3/fr

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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Stepping Motors (AREA)
  • Electromechanical Clocks (AREA)

Abstract

The interlocking device for stepping motor comprises a position detector comprised of an electret (4) which is integral with the rotor (1) of the stepping motor, of a fixed electrode (5) and of a detection circuit (6) responsive to the influence produced on the electrode (5) by the presence of the electrect (4) and supplying voltage signals to the control circuit of the stepping motor. According to those signals, the control circuit of the stepping motor corrects or not the operation of the latter.
CH454983A 1983-08-22 1983-08-22 CH654170GA3 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH454983A CH654170GA3 (en) 1983-08-22 1983-08-22
EP84903049A EP0153934A1 (en) 1983-08-22 1984-08-22 Interlocking device for stepping motor
PCT/CH1984/000133 WO1985001130A1 (en) 1983-08-22 1984-08-22 Interlocking device for stepping motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH454983A CH654170GA3 (en) 1983-08-22 1983-08-22

Publications (1)

Publication Number Publication Date
CH654170GA3 true CH654170GA3 (en) 1986-02-14

Family

ID=4278150

Family Applications (1)

Application Number Title Priority Date Filing Date
CH454983A CH654170GA3 (en) 1983-08-22 1983-08-22

Country Status (3)

Country Link
EP (1) EP0153934A1 (en)
CH (1) CH654170GA3 (en)
WO (1) WO1985001130A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4799766A (en) * 1988-03-15 1989-01-24 Eastman Kodak Company Objective lens support and positioning system
EP2735922A1 (en) * 2012-11-23 2014-05-28 ETA SA Manufacture Horlogère Suisse Drive mechanism for the hands of an electro-mechanical watch, provided with a locking device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53114467A (en) * 1977-03-16 1978-10-05 Seiko Instr & Electronics Ltd Electronic watch
CH616819GA3 (en) * 1977-08-05 1980-04-30 Electronic watch including a corrector circuit
IT1107822B (en) * 1978-04-03 1985-12-02 Olivetti & Co Spa STROBE SIGNAL GENERATOR
CH616045B (en) * 1978-06-20 Ebauches Sa PROCESS FOR REDUCING THE CONSUMPTION OF AN ELECTRONIC WATCH PART AND ELECTRONIC WATCH PART IMPLEMENTING THIS PROCESS.
US4224540A (en) * 1978-08-10 1980-09-23 Shigeo Okubo Displacement current sensor

Also Published As

Publication number Publication date
WO1985001130A1 (en) 1985-03-14
EP0153934A1 (en) 1985-09-11

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