GB1353176A - Drive-means for electrical time pieces - Google Patents

Drive-means for electrical time pieces

Info

Publication number
GB1353176A
GB1353176A GB3326071A GB3326071A GB1353176A GB 1353176 A GB1353176 A GB 1353176A GB 3326071 A GB3326071 A GB 3326071A GB 3326071 A GB3326071 A GB 3326071A GB 1353176 A GB1353176 A GB 1353176A
Authority
GB
United Kingdom
Prior art keywords
fork
oscillator
wheel
prong
drive
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
GB3326071A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1353176A publication Critical patent/GB1353176A/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
    • G04C3/12—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 piezoelectric means; driven by magneto-strictive 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

Landscapes

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

Abstract

1353176 Electric timepieces SIEMENS AG 15 July 1971 [17 July 1970] 33260/71 Addition to 1312996 Heading G3T [Also in Division F2] A frequency stabilized drive for a timepiece wherein a Piezo-electrically driven tuning fork 1 actuates a drive wheel 8 through a coupling 7 has a second, smaller tuning fork 4 electrically or mechanically coupled to the first fork and consisting of metal, the free ends of the prongs of the fork 4 carrying weights 5 which match the resonant frequency of these prongs to the fundamental frequency of the fork 1 whereby the second fork serves as a narrow band frequency standard. As shown, the prongs of fork 1 comprise Piezoelectric bimorphs and the right-hand (driving) prong is driven by a transistor oscillator. The left-hand prong produces a voltage which is applied to a Piezo-electric element 6 on one prong of the fork 4 and a similar element 6 on the other prong produces a feedback voltage for controlling the oscillator. Wheel 8 may comprise a conventional toothed wheel in which case the feedback voltage is applied directly to the oscillator. Alternatively, as shown, wheel 8 has a smooth surface and is formed of material into which the latch 7 sinks on the drive stroke and slides along on the return stroke. In this case the wheel carries magnetic elements 9 of alternate polarity which cooperate with a detector coil S in series between the fork 4 and the oscillator, the signals produced by coil S being compared with those produced by fork 4 so that the oscillator is also controlled in accordance with the desired speed of wheel 8. The oscillator may utilize a field-effect transistor or a pair of transistors connected in a Darlington circuit.
GB3326071A 1970-07-17 1971-07-15 Drive-means for electrical time pieces Expired GB1353176A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702035587 DE2035587A1 (en) 1970-07-17 1970-07-17 Uhrantneb with piezoelectric tuning fork

Publications (1)

Publication Number Publication Date
GB1353176A true GB1353176A (en) 1974-05-15

Family

ID=5777110

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3326071A Expired GB1353176A (en) 1970-07-17 1971-07-15 Drive-means for electrical time pieces

Country Status (8)

Country Link
US (1) US3747326A (en)
AT (1) AT315082B (en)
CH (1) CH987271A4 (en)
DE (1) DE2035587A1 (en)
FR (1) FR2099428A5 (en)
GB (1) GB1353176A (en)
IT (1) IT997021B (en)
NL (1) NL7109410A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1278994A1 (en) * 1974-07-05 1986-12-23 Киевский Ордена Ленина Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции Piezoelectric motor
CN113572387B (en) * 2021-07-27 2023-06-02 杭州电子科技大学 Piezoelectric actuator with tuning fork structure and working method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1849271A (en) * 1929-01-25 1932-03-15 Ward E Bower Oscillation generator
US2015410A (en) * 1934-02-05 1935-09-24 Continental Oil Co Vibrating system
CH400917A (en) * 1961-02-16 1965-06-30 Suwa Seikosha Kk Electric timepiece
CH405171A (en) * 1962-08-11 1965-09-15 Lavet Marius Jean Time apparatus and method of manufacturing this apparatus
DE1523958A1 (en) * 1965-08-28 1969-07-31 Kienzle Uhrenfabriken Gmbh Clock with torsion or bending oscillator
US3579974A (en) * 1967-04-08 1971-05-25 Gehap Gmbh & Co Kg Electronically-controlled drive mechanism particularly for clocks
FR1539922A (en) * 1967-08-09 1968-09-20 Lip Sa Portable time device
DE1809223B2 (en) * 1968-11-15 1972-11-30 Gebrüder Junghans GmbH, 7230 Schramberg WRISTWATCH WITH A PIEZOELECTRIC CRYSTAL AS A TIME HOLDING SWINGER
US3636469A (en) * 1969-11-10 1972-01-18 Bunker Ramo Beat frequency time standard

Also Published As

Publication number Publication date
CH987271A4 (en) 1974-06-28
DE2035587A1 (en) 1972-01-20
AT315082B (en) 1974-05-10
NL7109410A (en) 1972-01-19
US3747326A (en) 1973-07-24
FR2099428A5 (en) 1972-03-17
IT997021B (en) 1975-12-30

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees