GB921948A - Improvements in or relating to timepieces - Google Patents

Improvements in or relating to timepieces

Info

Publication number
GB921948A
GB921948A GB1547761A GB1547761A GB921948A GB 921948 A GB921948 A GB 921948A GB 1547761 A GB1547761 A GB 1547761A GB 1547761 A GB1547761 A GB 1547761A GB 921948 A GB921948 A GB 921948A
Authority
GB
United Kingdom
Prior art keywords
april
balance
timepieces
relating
astable
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
GB1547761A
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.)
SSIH Management Services SA
Original Assignee
SSIH Management Services SA
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 SSIH Management Services SA filed Critical SSIH Management Services SA
Publication of GB921948A publication Critical patent/GB921948A/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
    • G04C3/04—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 balance
    • G04C3/06—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 balance using electromagnetic coupling between electric power source and balance
    • G04C3/065—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 balance using electromagnetic coupling between electric power source and balance the balance controlling gear-train by means of static switches, e.g. transistor circuits
    • G04C3/069—Driving circuits using a single coil for detection and driving purposes

Abstract

921,948. Clocks and watches. SOC. SUISSE POUR L'INDUSTRIE HORLOGERE S.A. April 28, 1961 [April 28, 1960], No. 15477/61. Class 139. [Also in Group XL (c)] The maintaining circuit of a timepiece oscillating element e.g. a balance 1 comprises an astable square-wave transistor multivibrator and a coil 8 which moves relatively to three magnetic members 5, 6, 7 at least one of which is a permanent magnet. In another example the balance carries two magnets which move between two overlapping coils connected in series opposition. Specification 906,775 is referred to.
GB1547761A 1960-04-28 1961-04-28 Improvements in or relating to timepieces Expired GB921948A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH481860A CH382664A (en) 1960-04-28 1960-04-28 Electromagnetic maintenance device for the oscillating movement of the regulating organ of a timepiece

Publications (1)

Publication Number Publication Date
GB921948A true GB921948A (en) 1963-03-27

Family

ID=4283067

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1547761A Expired GB921948A (en) 1960-04-28 1961-04-28 Improvements in or relating to timepieces

Country Status (4)

Country Link
BE (1) BE602734A (en)
CH (2) CH481860A4 (en)
FR (1) FR1286393A (en)
GB (1) GB921948A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365635A (en) * 1963-10-17 1968-01-23 Smith & Sons Ltd S Oscillating motor for horological instruments
US3403312A (en) * 1965-01-02 1968-09-24 United States Time Corp Circuitry for timekeeping instruments
US3407344A (en) * 1964-09-26 1968-10-22 Shigeru Kakubari Electronic timekeeper
US3430119A (en) * 1965-07-22 1969-02-25 Smiths Industries Ltd Oscillating motor for horological instruments
US3509437A (en) * 1966-09-08 1970-04-28 Citizen Watch Co Ltd Timepiece drive
US3539888A (en) * 1968-07-24 1970-11-10 Aeroprojects Inc Automatic frequency control circuit for use with ultrasonic systems

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274999B (en) * 1964-10-15 1968-08-08 Siemens Elektrogeraete Gmbh Contactless controlled electric clock with self-start
DE2009612B2 (en) * 1970-03-02 1972-06-29 Forschungsgesellschaft für Uhren- und Feingeräte-Technik, 7000 Stuttgart VIBRATION SYSTEM WITH ELECTRONIC CONTROL FOR WATCHES
JPS4725077U (en) * 1971-04-12 1972-11-21

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365635A (en) * 1963-10-17 1968-01-23 Smith & Sons Ltd S Oscillating motor for horological instruments
US3407344A (en) * 1964-09-26 1968-10-22 Shigeru Kakubari Electronic timekeeper
US3403312A (en) * 1965-01-02 1968-09-24 United States Time Corp Circuitry for timekeeping instruments
US3430119A (en) * 1965-07-22 1969-02-25 Smiths Industries Ltd Oscillating motor for horological instruments
US3509437A (en) * 1966-09-08 1970-04-28 Citizen Watch Co Ltd Timepiece drive
US3539888A (en) * 1968-07-24 1970-11-10 Aeroprojects Inc Automatic frequency control circuit for use with ultrasonic systems

Also Published As

Publication number Publication date
DE1448348B2 (en) 1970-08-13
BE602734A (en) 1961-08-16
FR1286393A (en) 1962-03-02
DE1448348A1 (en) 1969-06-12
CH382664A (en) 1964-06-15
CH481860A4 (en) 1964-06-15

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