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GB1402679A - Electronic timepieces - Google Patents

Electronic timepieces

Info

Publication number
GB1402679A
GB1402679A GB2484873A GB2484873A GB1402679A GB 1402679 A GB1402679 A GB 1402679A GB 2484873 A GB2484873 A GB 2484873A GB 2484873 A GB2484873 A GB 2484873A GB 1402679 A GB1402679 A GB 1402679A
Authority
GB
United Kingdom
Prior art keywords
voltage
circuit
circuits
battery
relatively high
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
GB2484873A
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
Priority to US05/432,720 priority Critical patent/US3934399A/en
Publication of GB1402679A publication Critical patent/GB1402679A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G99/00—Subject matter not provided for in other groups of this subclass
    • G04G99/003—Pulse shaping; Amplification
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
    • G04G19/02—Conversion or regulation of current or voltage
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0023—Visual time or date indication means by light valves in general
    • G04G9/0029—Details
    • G04G9/0047—Details electrical, e.g. selection or application of the operating voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Clocks (AREA)

Abstract

1402679 Electronic timepieces SUWA SEIKOSHA KK 24 May 1973 [12 June 1972] 24848/73 Heading G3T In an electronic timepiece, oscillator 2 and frequency divider 3 circuits are supplied with a relatively low D.C. voltage from a battery 1. Converting means 6, 7 produce a relatively high A.C. voltage from the battery and rectifier 9 converts the A.C. voltage into a relatively high D.C. voltage to supply the display circuit 5 and its driving circuit 9. The divider and driving circuits can conveniently be made in the form of integrated circuits while the D.C./A.C. converter circuit 6, the voltage booster circuit are assembled from individual components. Liquid crystal or ferroelectric devices may be used in the display.
GB2484873A 1972-06-12 1973-05-24 Electronic timepieces Expired GB1402679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/432,720 US3934399A (en) 1972-06-12 1974-01-11 Electric timepiece incorporating rectifier and driving circuits integrated in a single chip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47058476A JPS4919853A (en) 1972-06-12 1972-06-12

Publications (1)

Publication Number Publication Date
GB1402679A true GB1402679A (en) 1975-08-13

Family

ID=13085474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2484873A Expired GB1402679A (en) 1972-06-12 1973-05-24 Electronic timepieces

Country Status (6)

Country Link
JP (1) JPS4919853A (en)
DE (1) DE2329875B2 (en)
FR (1) FR2188210B1 (en)
GB (1) GB1402679A (en)
HK (1) HK3378A (en)
MY (1) MY7800065A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5666700U (en) * 1979-10-30 1981-06-03

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH532811A (en) * 1970-05-11 1972-08-31 Manuf Des Montres Rolex S A Bi Timepiece comprising a display device with at least one liquid crystal cell

Also Published As

Publication number Publication date
MY7800065A (en) 1978-12-31
DE2329875B2 (en) 1979-08-16
HK3378A (en) 1978-01-27
FR2188210A1 (en) 1974-01-18
DE2329875A1 (en) 1974-01-03
FR2188210B1 (en) 1977-08-19
JPS4919853A (en) 1974-02-21

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930523