GB1528077A - Electronic timepiece - Google Patents

Electronic timepiece

Info

Publication number
GB1528077A
GB1528077A GB4296776A GB4296776A GB1528077A GB 1528077 A GB1528077 A GB 1528077A GB 4296776 A GB4296776 A GB 4296776A GB 4296776 A GB4296776 A GB 4296776A GB 1528077 A GB1528077 A GB 1528077A
Authority
GB
United Kingdom
Prior art keywords
temperature
oct
curve
electronic timepiece
timepiece
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
GB4296776A
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
Original Assignee
Seiko Instruments Inc
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 filed Critical Seiko Instruments Inc
Publication of GB1528077A publication Critical patent/GB1528077A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
    • H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
    • H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
    • H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
    • G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses
    • G04F5/06—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses using piezoelectric resonators

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Electric Clocks (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

1528077 Electronic timepieces DAINI SEIKOSHA KK 15 Oct 1976 [23 Oct 1975] 42967/76 Heading G3T In an electronic timepiece having a quartz crystal controlled oscillator circuit for producing a time standard signal, the crystal has a "turning point temperature" in the range between 14‹C and 18‹C. The turning point temperature is the temperature at which the rate of change of #f/f is zero i.e. the temperature T px in curve B Fig. 2 wherein #f is the frequency deviation of the oscillator between temperatures T px and T px + α. Curve A is in respect of a conventional quartz oscillator in a timepiece.
GB4296776A 1975-10-23 1976-10-15 Electronic timepiece Expired GB1528077A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12781575A JPS5251887A (en) 1975-10-23 1975-10-23 Electronic watch

Publications (1)

Publication Number Publication Date
GB1528077A true GB1528077A (en) 1978-10-11

Family

ID=14969340

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4296776A Expired GB1528077A (en) 1975-10-23 1976-10-15 Electronic timepiece

Country Status (2)

Country Link
JP (1) JPS5251887A (en)
GB (1) GB1528077A (en)

Also Published As

Publication number Publication date
JPS5251887A (en) 1977-04-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921015