GB1303455A - - Google Patents

Info

Publication number
GB1303455A
GB1303455A GB3534270A GB3534270A GB1303455A GB 1303455 A GB1303455 A GB 1303455A GB 3534270 A GB3534270 A GB 3534270A GB 3534270 A GB3534270 A GB 3534270A GB 1303455 A GB1303455 A GB 1303455A
Authority
GB
United Kingdom
Prior art keywords
motor
frequency
transistor
bistable
voltage
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
GB3534270A
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
Publication of GB1303455A publication Critical patent/GB1303455A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C11/00—Synchronisation of independently-driven clocks
    • G04C11/08—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction
    • G04C11/081—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction using an electro-magnet
    • G04C11/084—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction using an electro-magnet acting on the balance
    • 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
    • G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/10—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means
    • G04C3/108—Driving circuits
    • 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
    • G04C3/16—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating an electro-dynamic continuously rotating motor
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
    • G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

1303455 Electric timepieces COMPAGNIE DES MONTRES LONGINES FRANGILLION S A and BERNARD GOLAY S A 21 July 1970 [12 Aug 1969] 35342/70 Heading G3T In a frequency stabilizing arrangement within an electronic timepiece, a phase comparator in the form of a bistable circuit including transistors 13, 15 Fig.3 is switched to one state (both conducting) by pulses at the frequency of oscillation of a vibratory motor having coils 1 and is switched to its other state by a signal at a reference frequency f o from a stable oscillator (not shown) (or from a stable oscillator via a frequency divider) applied via a transistor 16. The duration of the conduction period of Tr13, Tr15 is dependent upon the difference in frequency between the motor resonance frequency and f o , the greater the motor vibration rate relative to the reference frequency the longer the ON times of the bistable and viceversa. Output pulses from the bistable are integrated by C18 R19 and the direct voltage at a point II is a function of the deviation of the motor frequency from the reference f o . This voltage is applied to a varicap diode 20. When the voltage at point II increases the capacity of diode 20 increases and vice-versa. The diode 20 being connected to the motor coil 1 tends to shift the resonance frequency of the motor to the correct value f o . The motor coil 1 moves in a magnetic field and a sinusoidal voltage induced thereacross is applied via C7 across the base/emitter of a transistor 6. Tr 6 thus produces current pulses through R8 R9 thereby causing current pulses from Tr 10 which sustain the oscillations of the motor. When a pulse appears at the collector of Tr 6 a transistor 11 conducts and rapidly changes a capacitor 12. Simultaneously a pulse is applied to the bistable transistor 13 turning it ON and consequently Tr 15 conducts and remains conducting until Tr 16 is turned ON by f o . The repetition rate of the said pulse applied to Tr 13 corresponds to the motor frequency. Alternatively the motor may be driven directly by the reference frequency.
GB3534270A 1969-08-12 1970-07-21 Expired GB1303455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1222869A CH532280A (en) 1969-08-12 1969-08-12 Electronic watch

Publications (1)

Publication Number Publication Date
GB1303455A true GB1303455A (en) 1973-01-17

Family

ID=4381067

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3534270A Expired GB1303455A (en) 1969-08-12 1970-07-21

Country Status (5)

Country Link
US (1) US3766454A (en)
CH (2) CH1222869A4 (en)
DE (1) DE2038185A1 (en)
FR (1) FR2058215B1 (en)
GB (1) GB1303455A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309291A1 (en) * 1973-02-24 1974-08-29 Itt Ind Gmbh Deutsche PROCESS FOR SYNCHRONIZING MECHANICAL VIBRATORS OF USED WATCHES
US3892066A (en) * 1974-02-27 1975-07-01 Microna Inc Synchronized watch movement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396224A (en) * 1943-06-16 1946-03-12 Rca Corp Oscillation generator
US3021492A (en) * 1961-04-11 1962-02-13 Avco Corp Automatic phase control system
US3249876A (en) * 1963-02-07 1966-05-03 Gen Dynamics Corp Precision tracking of electrically tuned circuits
US3282042A (en) * 1964-09-10 1966-11-01 Bulova Watch Co Inc Crystal controlled chronometer
GB1205753A (en) * 1966-09-09 1970-09-16 Smiths Industries Ltd Horological instruments incorporating electrical oscillation generators
FR1537298A (en) * 1967-09-08 1968-08-23 Smiths Industries Ltd Chronometric instruments incorporating circuits producing electrical oscillations
JPS4943989B1 (en) * 1968-07-19 1974-11-26

Also Published As

Publication number Publication date
FR2058215A1 (en) 1971-05-28
US3766454A (en) 1973-10-16
DE2038185A1 (en) 1971-05-19
CH532280A (en) 1972-09-15
CH1222869A4 (en) 1972-09-15
FR2058215B1 (en) 1973-08-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees