GB1418749A - Electronic drive circuit for maintenance of the oscillations of a balance wheel - Google Patents

Electronic drive circuit for maintenance of the oscillations of a balance wheel

Info

Publication number
GB1418749A
GB1418749A GB1205873A GB1205873A GB1418749A GB 1418749 A GB1418749 A GB 1418749A GB 1205873 A GB1205873 A GB 1205873A GB 1205873 A GB1205873 A GB 1205873A GB 1418749 A GB1418749 A GB 1418749A
Authority
GB
United Kingdom
Prior art keywords
oscillations
balance wheel
current
maintenance
drive circuit
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
GB1205873A
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.)
Ebauches SA
Original Assignee
Ebauches 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 Ebauches SA filed Critical Ebauches SA
Publication of GB1418749A publication Critical patent/GB1418749A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electronic Switches (AREA)

Abstract

1418749 Pulse oscillator circuits EBAUCHES SA 13 March 1973 [28 March 1972] 12058/73 Heading H3T [Also in Division G3] The oscillations of a balance wheel of a timepiece are maintained by an astable multivibrator (e.g. as Fig. 1) comprising a coil 4 electromagnetically coupled to the balance, transistors T1, T2, a timing circuit including capacitor 1 and a negative feedback circuit including T3, T4 and resistor 5 connected as a current mirror. When current 12 increases, the potential at a point B becomes lower. Consequently currents I4 and I3 become lower. (The ratio of I3/I4 is said to equal the ratio of areas of the surfaces of T3 and T4). The decreasing of current I3 opposes any increase in I2 and a state of equilibrium is reached before T2 is saturated. The use of a more elaborate current mirror in integrated form is described with reference to Fig. 2, not shown.
GB1205873A 1972-03-28 1973-03-13 Electronic drive circuit for maintenance of the oscillations of a balance wheel Expired GB1418749A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH456972A CH574637B5 (en) 1972-03-28 1972-03-28

Publications (1)

Publication Number Publication Date
GB1418749A true GB1418749A (en) 1975-12-24

Family

ID=4278532

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1205873A Expired GB1418749A (en) 1972-03-28 1973-03-13 Electronic drive circuit for maintenance of the oscillations of a balance wheel

Country Status (7)

Country Link
US (1) US3844106A (en)
JP (1) JPS5319220B2 (en)
CH (2) CH456972A4 (en)
DE (1) DE2312140A1 (en)
FR (1) FR2177813B1 (en)
GB (1) GB1418749A (en)
IT (1) IT981520B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203866A (en) * 1987-03-06 1988-10-26 Seikosha Kk Electromagnetic drive circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1056166A (en) * 1975-03-27 1979-06-12 Jauch, Heinz Method and aparatus for synchronising a mechanical oscillating system to the accuracy of a quartz standard
JPS57188172U (en) * 1981-05-25 1982-11-29

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1673776A1 (en) * 1967-04-19 1971-02-25 Siemens Ag Circuit arrangement for contactless control of a mechanical oscillator
DE2036330C3 (en) * 1970-07-22 1974-05-02 Deutsche Itt Industries Gmbh, 7800 Freiburg Method and circuit arrangement for automatic amplitude control of electromechanical oscillators
DE2102025B1 (en) * 1971-01-16 1972-07-13 Deutsche Itt Industries Gmbh Astable milivibrator with two complementary transistors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203866A (en) * 1987-03-06 1988-10-26 Seikosha Kk Electromagnetic drive circuit
GB2203866B (en) * 1987-03-06 1991-01-30 Seikosha Kk Electromagnetic drive circuit

Also Published As

Publication number Publication date
CH456972A4 (en) 1975-11-14
DE2312140A1 (en) 1973-10-11
US3844106A (en) 1974-10-29
JPS5319220B2 (en) 1978-06-20
FR2177813A1 (en) 1973-11-09
JPS499278A (en) 1974-01-26
FR2177813B1 (en) 1975-10-31
CH574637B5 (en) 1976-04-15
IT981520B (en) 1974-10-10

Similar Documents

Publication Publication Date Title
US3718870A (en) Driving circuit for electro-mechanical oscillators
GB1447379A (en) Circuit having a switching voltage hysteresis
GB1390975A (en) Automatic engine speed control system
GB1455703A (en) Electronic gain control circuit arrangement
JPS55109003A (en) Oscillation circuit
GB1498140A (en) Square wave generating circuit
GB1418749A (en) Electronic drive circuit for maintenance of the oscillations of a balance wheel
JPS5274263A (en) Oscillation circuit
JPS5293257A (en) Oscillator
US3818376A (en) Method and apparatus for synchronizing the balance system of clocks or wrist watches
ES410071A1 (en) Integrated circuit for electronic timepieces
JPS52122451A (en) Oscillation circuit
FR2331080B1 (en)
GB1240070A (en) Electronic circuit for driving a mechanical oscillating system
US3742385A (en) Cross coupled complementary transistor circuit for single coil electro mechanical oscillator
GB1349697A (en) Quartz oscillator more especially for a clock drive
GB1262744A (en) Electro-magnetic driving system for timepieces
JPS5338249A (en) Crystal oscillator circuit
GB1519092A (en) Voltage controlled oscillator circuit
GB1181185A (en) Circuit for Stabilizing the Amplitude in a Directly Driven Mechanical Oscillatory System
GB1146494A (en) Electronic timekeeper
JPS5361954A (en) Transistor oscillation circuit
GB1347661A (en) Timepiece
GB1225389A (en)
JPS5318367A (en) Bias circuit

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee