JPS5456868A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS5456868A
JPS5456868A JP12311977A JP12311977A JPS5456868A JP S5456868 A JPS5456868 A JP S5456868A JP 12311977 A JP12311977 A JP 12311977A JP 12311977 A JP12311977 A JP 12311977A JP S5456868 A JPS5456868 A JP S5456868A
Authority
JP
Japan
Prior art keywords
temperature
piezoelectric vibrators
temperature coefficient
electronic watch
frequency
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.)
Pending
Application number
JP12311977A
Other languages
Japanese (ja)
Inventor
Hirochika Sato
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
Priority to JP12311977A priority Critical patent/JPS5456868A/en
Publication of JPS5456868A publication Critical patent/JPS5456868A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G04F5/063—Constructional details

Landscapes

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

Abstract

PURPOSE:To improve the frequency temperature characteristics by specifying the shape of piezoelectric vibrators in an electronic watch using two or more piezoelectric vibrators. CONSTITUTION:Piezoelectric vibrators 5 composed of crystal, etc. are formed in tuning fork type of less than 150mum in thickness and at least one is etched to provide tapers 12a, 12b to its vibrating arms 10a, 10b, so that a change is given to their width direction size over part or the whole of the length direction. These cause zero temperature coefficient temperature to be deviated by several degrees to the high temperature side without changing the value of secondary temperature coefficient too much, the zero temperature coefficient temperature on the high temperature side to be sufficiently increased, the spacing between the piezoelectric vibrators 5 to be taken wide, the frequency temperature characteristics to be corrected over a sufficiently wide temperature range and the watch accuracy to be improved.
JP12311977A 1977-10-14 1977-10-14 Electronic watch Pending JPS5456868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12311977A JPS5456868A (en) 1977-10-14 1977-10-14 Electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12311977A JPS5456868A (en) 1977-10-14 1977-10-14 Electronic watch

Publications (1)

Publication Number Publication Date
JPS5456868A true JPS5456868A (en) 1979-05-08

Family

ID=14852644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12311977A Pending JPS5456868A (en) 1977-10-14 1977-10-14 Electronic watch

Country Status (1)

Country Link
JP (1) JPS5456868A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013066210A (en) * 2012-11-15 2013-04-11 Seiko Epson Corp Vibration piece, vibrator, oscillator, sensor and device
JP2013066211A (en) * 2012-11-15 2013-04-11 Seiko Epson Corp Vibration piece, vibrator, oscillator, sensor and device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013066210A (en) * 2012-11-15 2013-04-11 Seiko Epson Corp Vibration piece, vibrator, oscillator, sensor and device
JP2013066211A (en) * 2012-11-15 2013-04-11 Seiko Epson Corp Vibration piece, vibrator, oscillator, sensor and device

Similar Documents

Publication Publication Date Title
JPS53145595A (en) Elastic surface wave oscillator
GB1524265A (en) Method of adjusting a gt-cut quartz crystal osillator
JPS5393792A (en) Crystal vibrator
JPS5291669A (en) Piezoelectric vibrator
JPS533178A (en) Crystal vibrator
JPS5456868A (en) Electronic watch
CH607880GA3 (en)
JPS56153527A (en) Piezoelectric bimorph type transducer
JPS5441773A (en) Electronic watch
JPS5277690A (en) Turning fork type crystal resonator
JPS52119195A (en) Crystal resonator in tuning fork type
JPS5343490A (en) Tuning fork type crystal vibrator
JPS5291672A (en) Longer side piezoelectric vibrator
JPS5332690A (en) Tuning fork type piezoelectric vibrator
JPS5571310A (en) At cut crystal vibrator
JPS5357788A (en) Electrode structure of tuning fork type crystal
JPS5266386A (en) Production of ultra-sonic oscillator
JPS5263046A (en) Ladder type piezo-electric filter
JPS54131850A (en) Crystal oscillator for watch
JPS53136990A (en) Composite piezoelectric oscillator
JPS5467787A (en) Temperature compensation system
JPS5215283A (en) Method of manufacturing piezo-electric ceramic resonator
JPS5215282A (en) Method of manufacturing piezo-electric ceramic resonator
JPS5287996A (en) Thickness shear crystal oscillator
JPS53131793A (en) Tuning fork type crystal vibrator