GB993140A - Improvements in or relating to electric timepieces - Google Patents

Improvements in or relating to electric timepieces

Info

Publication number
GB993140A
GB993140A GB612062A GB612062A GB993140A GB 993140 A GB993140 A GB 993140A GB 612062 A GB612062 A GB 612062A GB 612062 A GB612062 A GB 612062A GB 993140 A GB993140 A GB 993140A
Authority
GB
United Kingdom
Prior art keywords
vibrator
feb
elements
kabushiki kaisha
electric
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
GB612062A
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.)
Seiko Instruments Inc
Suwa Seikosha KK
Original Assignee
Seiko Instruments Inc
Suwa Seikosha KK
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 Seiko Instruments Inc, Suwa Seikosha KK filed Critical Seiko Instruments Inc
Publication of GB993140A publication Critical patent/GB993140A/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

Landscapes

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

Abstract

993,140. Clocks and watches. KABUSHIKI KAISHA SUWA SEIKOSHA, and KABUSHIKI KAISHA DAINI SEIKOSHA. Feb. 16,1962 [Feb. 16, 1961; Feb. 18,1961], No. 6120/62. Heading G3T. [Also in Division H3] An electric timepiece comprises an elastic vibrating member such as a tuning fork forming a time standard, this vibrator being maintained, through a suitable amplifier, by driving and detecting piezo-electric elements a, b respectively fixed to the vibrator which drives the time train through a pawl and ratchet not shown. As shown, connections from the elements a, b along with a third connection from the root of the fork, are made to a circuit comprising the transistor Tr, battery Bt, circuit switch SW, resistors R 1 , R 2 , R 4 and R 5 , and capacitors C 1 and C 2 . The vibrator may be in the form of a straight bar supported at two nodes. In another embodiment, the vibrator is in the form of a gapped circular ring carrying added masses at its free ends, the ring being supported at two nodes near which the elements a, b are fixed. The vibrator may be of a material possessing an invariable elastic modulus in ordinary temperatures, e.g. elinvar.
GB612062A 1961-02-16 1962-02-16 Improvements in or relating to electric timepieces Expired GB993140A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP716361 1961-02-16
JP532361 1961-02-18

Publications (1)

Publication Number Publication Date
GB993140A true GB993140A (en) 1965-05-26

Family

ID=26339246

Family Applications (1)

Application Number Title Priority Date Filing Date
GB612062A Expired GB993140A (en) 1961-02-16 1962-02-16 Improvements in or relating to electric timepieces

Country Status (3)

Country Link
CH (1) CH400917A (en)
DE (1) DE1523943A1 (en)
GB (1) GB993140A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462939A (en) * 1965-02-12 1969-08-26 Tokei Kk Mechanical vibrator for timepiece
US3512352A (en) * 1967-04-12 1970-05-19 Seiko Instr & Electronics Frequency regulator and method for regulating frequency of electric timepieces
US3747326A (en) * 1970-07-17 1973-07-24 Siemens Ag Clock drive with piezoelectric tuning fork

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462939A (en) * 1965-02-12 1969-08-26 Tokei Kk Mechanical vibrator for timepiece
US3512352A (en) * 1967-04-12 1970-05-19 Seiko Instr & Electronics Frequency regulator and method for regulating frequency of electric timepieces
US3747326A (en) * 1970-07-17 1973-07-24 Siemens Ag Clock drive with piezoelectric tuning fork

Also Published As

Publication number Publication date
CH400917A (en) 1965-06-30
DE1523943A1 (en) 1969-12-11

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