GB1410520A - Timepiece oscillator - Google Patents

Timepiece oscillator

Info

Publication number
GB1410520A
GB1410520A GB5877772A GB5877772A GB1410520A GB 1410520 A GB1410520 A GB 1410520A GB 5877772 A GB5877772 A GB 5877772A GB 5877772 A GB5877772 A GB 5877772A GB 1410520 A GB1410520 A GB 1410520A
Authority
GB
United Kingdom
Prior art keywords
coil
base
balance
timepiece
frusto
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
GB5877772A
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.)
Suwa Seikosha KK
Original Assignee
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 Suwa Seikosha KK filed Critical Suwa Seikosha KK
Publication of GB1410520A publication Critical patent/GB1410520A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Linear Motors (AREA)
  • Electromechanical Clocks (AREA)

Abstract

1410520 Electric watches SUWA SEIKOSHA KK 21 Dec 1972 [29 Dec 1971] 58777/72 Heading G3T In a balance oscillator for a timepiece, a driving and pick-up coil and/or the coil-holder is tapered axially of the balance to reduce air turbulence and thus improve the isochronism of the timepiece. In a first embodiment, Fig. 4, two balance wheels 11, 12 carry pairs of permanent magnets 14, 16 respectively, and the coil 24, which is supported by a member 21, comprises two base-tobase frusto-conical parts. In a second embodiment, Fig. 6, a portion 31 of the coil-holder 21, which extends around the circumference of the coil, comprises two base-to-base frusto-conical parts.
GB5877772A 1971-12-29 1972-12-21 Timepiece oscillator Expired GB1410520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP187671 1971-12-29

Publications (1)

Publication Number Publication Date
GB1410520A true GB1410520A (en) 1975-10-15

Family

ID=11513745

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5877772A Expired GB1410520A (en) 1971-12-29 1972-12-21 Timepiece oscillator

Country Status (2)

Country Link
US (1) US3798890A (en)
GB (1) GB1410520A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2986683A (en) * 1956-07-26 1961-05-30 Hatot Leon Ets Driving balance-wheels more particularly applicable to timing instruments
GB1009456A (en) * 1962-12-19 1965-11-10 Smith & Sons Ltd S Improvements in or relating to horological instruments

Also Published As

Publication number Publication date
US3798890A (en) 1974-03-26

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Legal Events

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