GB1258034A - - Google Patents

Info

Publication number
GB1258034A
GB1258034A GB1258034DA GB1258034A GB 1258034 A GB1258034 A GB 1258034A GB 1258034D A GB1258034D A GB 1258034DA GB 1258034 A GB1258034 A GB 1258034A
Authority
GB
United Kingdom
Prior art keywords
transducers
drive
sheet
tine
pick
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
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 filed Critical
Publication of GB1258034A publication Critical patent/GB1258034A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/24—Constructional features of resonators of material which is not piezoelectric, electrostrictive, or magnetostrictive
    • 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
    • G04C3/10—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 electromagnetic means
    • G04C3/101—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 electromagnetic means constructional details
    • G04C3/102—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 electromagnetic means constructional details of the mechanical oscillator or of the coil
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Gyroscopes (AREA)

Abstract

1,258,034. Oscillator circuits. BUNKERRAMO CORP. 2 June, 1970 [23 July, 1969], No. 26464/70. Heading H3F. [Also in Divisions G3, G5 and H2] A vibrator structure comprising a pair of metallic tine members integral with a base portion is formed by stamping out a U-shaped aperture in a thin metallic sheet, as shown in Fig. 1. The portion 14 of the sheet defines one tine member, and the portions 12a, 12b and 16 together define the other tine member, the remaining portion 22 defining the base. The sheet 10 may be in the form of a bi-metal laminated sheet, one lamina being made of a material from a class of high nickel content alloys having a positive temperature coefficient of elasticity, and the other lamina being made of a material having a negative coefficient of elasticity. Holes, such as 20, may be formed in either or both tine members to equalize the resonant frequencies of the tine members, or a weight, such as 18, may be added. Alternatively, the shape of the aperture 15 may be made suitable to achieve this end. Piezo-electric transducers 48, 50, 52, as shown on Fig. 8, may be attached at the base, the pick-up transducers 50, 52 providing an output signal via amplifier 53<SP>1</SP> to the drive transducer 48, thus sustaining "fork mode" oscillations of the tuning fork. These oscillations may be fed via 54 through another amplifier to drive an electric clock (not shown). The two pick-up transducers 50, 52 are arranged in an out-of-phase relationship so any "reed mode" vibrations of the tuning fork, caused by spurious vibrational forces, are cancelled. In this.arrangement, transducers 50, 52 are located remotely enough from the drive-transducer 48 to minimize strain coupling between the drive and pick-up transducers. Electromagnetic transducers may also be used in this arrangement, either in combination with piezo-electric transdncers, or instead of them.
GB1258034D 1969-07-23 1970-06-03 Expired GB1258034A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84392369A 1969-07-23 1969-07-23

Publications (1)

Publication Number Publication Date
GB1258034A true GB1258034A (en) 1971-12-22

Family

ID=25291340

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1258034D Expired GB1258034A (en) 1969-07-23 1970-06-03

Country Status (6)

Country Link
US (1) US3636810A (en)
JP (1) JPS4829055B1 (en)
AR (1) AR192557A1 (en)
DE (1) DE2030123A1 (en)
FR (1) FR2053930A5 (en)
GB (1) GB1258034A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759133A (en) * 1972-01-24 1973-09-18 Bunker Ramo Vibrator structure and method and apparatus for adjusting the frequency thereof
US4004166A (en) * 1975-03-12 1977-01-18 Nihon Dempa Kogyo Co., Ltd. Method for stabilizing the vibration frequency of a tuning fork-type quartz crystal oscillator
US5227572A (en) * 1991-09-09 1993-07-13 Cusack John F Titanium reed for musical instruments
US6064169A (en) * 1995-10-11 2000-05-16 The Charles Stark Draper Laboratory, Inc. Motor amplitude control circuit in conductor-on-insulator tuning fork gyroscope
US5987987A (en) 1997-04-14 1999-11-23 Denso Corporation Angular velocity sensor, related method for manufacturing the sensor, and piezoelectric vibrator element used in this sensor
JP6617891B2 (en) * 2015-12-21 2019-12-11 株式会社村田製作所 Resonator and resonance device

Also Published As

Publication number Publication date
JPS4829055B1 (en) 1973-09-06
AR192557A1 (en) 1973-02-28
US3636810A (en) 1972-01-25
DE2030123A1 (en) 1971-02-04
FR2053930A5 (en) 1971-04-16

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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