GB840086A - Electrical timepiece - Google Patents

Electrical timepiece

Info

Publication number
GB840086A
GB840086A GB14867/56A GB1486756A GB840086A GB 840086 A GB840086 A GB 840086A GB 14867/56 A GB14867/56 A GB 14867/56A GB 1486756 A GB1486756 A GB 1486756A GB 840086 A GB840086 A GB 840086A
Authority
GB
United Kingdom
Prior art keywords
fork
impulses
amplitude
maintaining
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
GB14867/56A
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.)
Bulova Watch Co Inc
Original Assignee
Bulova Watch Co Inc
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 Bulova Watch Co Inc filed Critical Bulova Watch Co Inc
Publication of GB840086A publication Critical patent/GB840086A/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
    • G04C3/08—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
    • 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
    • G04C3/101—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 constructional details
    • 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
    • G04C3/101—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 constructional details
    • G04C3/107—Controlling frequency or amplitude of the oscillating system
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1526—Oscillation or reciprocation to intermittent unidirectional motion
    • Y10T74/1553—Lever actuator
    • Y10T74/1555—Rotary driven element

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)

Abstract

840,086. Transistor oscillator circuits. BULOVA WATCH CO. Inc. May 14, 1956 [May 12, 1955], No. 14867/56. Class 40 (6). [Also in Group XVIII] An electric battery driven timepiece has a tuning fork vibrator 1102, Fig. 1, which is maintained in oscillation by impulses from a driving coil D connected to the collector of a transistor to the base of which is connected a sensing or pick-up coil S, as shown in Fig. 2. The base of the transistor is positively biased by an R-C network. The alternating voltage induced in the sensing coil S overcomes the positive base bias during part of the fork vibratory cycle and the alternating voltage induced in the driving coil D which is dependent on the amplitude of fork vibration determines the collector voltage and current and so determines the magnitude of the maintaining impulses. The maintaining impulses are normally just sufficiently powerful to keep the fork vibrating at its natural frequency with an amplitude sufficient to correctly drive the ratchet wheel 1121, Fig. 1. During start-up the impulses imparted to the fork are stronger until the fork reaches the desired amplitude. If because of shock, the fork amplitude is excessive the maintaining impulses are correspondingly weaker or even cut-out until the fork resumes its normal amplitude. Specification 761,609 is referred to.
GB14867/56A 1955-05-12 1956-05-14 Electrical timepiece Expired GB840086A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH840086X 1955-05-12

Publications (1)

Publication Number Publication Date
GB840086A true GB840086A (en) 1960-07-06

Family

ID=4541157

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14867/56A Expired GB840086A (en) 1955-05-12 1956-05-14 Electrical timepiece

Country Status (7)

Country Link
US (1) US2960817A (en)
CA (1) CA583728A (en)
CH (1) CH342171A (en)
DE (1) DE1095747B (en)
FR (1) FR1153306A (en)
GB (1) GB840086A (en)
IT (1) IT552682A (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124730A (en) * 1964-03-10 Thoma
US3118383A (en) * 1964-01-21 Electromagnetically actuated device with feedback control
US3118098A (en) * 1957-06-07 1964-01-14 Jahresuhren Fabrik G M B H Oscillating drive electromagnetic motor system
DE1087528B (en) * 1958-01-10 1960-08-18 Reich Robert W Time-keeping electrical device, in particular an electrical clock
DE1166101B (en) * 1958-06-14 1964-03-19 Durowe Deutsche Uhren Rohwerke Contactless controlled mechanical oscillator as a gear folder of a time-keeping device
US3079748A (en) * 1960-06-27 1963-03-05 Sylvania Electric Prod Illuminated electronic time piece
US3132522A (en) * 1960-12-06 1964-05-12 Gen Precision Inc Rotary speed regulator
CH371057A (en) * 1961-03-14 1963-04-11 Suisse Horlogerie Rech Lab Electronic timepiece
CH409791A (en) * 1964-02-18 1965-11-30 Centre Electron Horloger Electronic watch
US3292064A (en) * 1964-03-16 1966-12-13 Gen Electric Frequency regulated chronometer
DE1548062C3 (en) * 1964-06-03 1975-12-11 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for an electric clock with a mechanical bending oscillator
US3338047A (en) * 1965-10-18 1967-08-29 Gen Time Corp Frequency regulator for tuning fork drive system
DE1287519B (en) * 1966-04-22 1969-01-16 Kienzle Uhrenfabriken Gmbh Device for converting the vibrations of a tuning fork into a progressive rotary motion
CH797368A4 (en) * 1968-05-29 1970-04-15
DE2419432C3 (en) * 1974-04-23 1985-05-09 Papst-Motoren GmbH & Co KG, 7742 St Georgen Brushless DC motor with a stator and a permanent magnet rotor
WO1982000879A1 (en) * 1979-02-12 1982-03-18 R Scholl Displacement transducer
EP2425894B1 (en) 2007-06-21 2016-12-28 Gen-Probe Incorporated Instruments and method for exposing a receptacle to multiple thermal zones

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR767359A (en) * 1933-04-10 1934-07-17 Synchronous time device
FR1090564A (en) * 1953-09-17 1955-03-31 Hatot Leon Ets Improvements to time mechanisms and similar devices
FR1092411A (en) * 1953-10-21 1955-04-21 Hatot Leon Ets Improvements to electromagnetic time devices

Also Published As

Publication number Publication date
CA583728A (en) 1959-09-22
CH342171A (en) 1959-10-31
IT552682A (en)
FR1153306A (en) 1958-03-05
DE1095747B (en) 1960-12-22
US2960817A (en) 1960-11-22

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