GB479637A - Improvements in or relating to piezoelectric crystals - Google Patents

Improvements in or relating to piezoelectric crystals

Info

Publication number
GB479637A
GB479637A GB4298/37A GB429837A GB479637A GB 479637 A GB479637 A GB 479637A GB 4298/37 A GB4298/37 A GB 4298/37A GB 429837 A GB429837 A GB 429837A GB 479637 A GB479637 A GB 479637A
Authority
GB
United Kingdom
Prior art keywords
crystal
frequency
piezo
thinning
electrode
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
GB4298/37A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB479637A publication Critical patent/GB479637A/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
    • H03H9/02—Details
    • H03H9/05—Holders; Supports
    • H03H9/09—Elastic or damping supports
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
    • H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
    • H03H9/19—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator consisting of quartz
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/42—Piezoelectric device making

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Insulated Conductors (AREA)

Abstract

479,637. Piezo - electric crystals. STANDARD TELEPHONES & CABLES, Ltd. Feb. 12, 1937, No. 4298. Convention date, May 1, 1936. Drawings to Specifleation. [Class 40 (v)] A piezo-electric crystal has its temperature coefficient of frequency adjusted by thinning at the edges so as to vary slightly the angle # between the major surface and the Z-axis. This has little effect on frequency which may, however, be adjusted by concaving the surfaces or by thinning the crystal as a whole. The angle # is selected within a range +36À5‹ to +39‹ or - 51‹ to - 53‹ according to the working temperature of the crystal, Figs. 12, 13 (not shown). The thickness is then selected to give the required frequency. One electrode is preferably convex, making contact with the crystal at a node, and the other electrode is preferably spaced 0À002" from the crystal to prevent arcing. The crystal preferably vibrates in a face shear mode. Specification 471,465 is referred to.
GB4298/37A 1936-04-22 1937-02-12 Improvements in or relating to piezoelectric crystals Expired GB479637A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75727A US2123236A (en) 1936-04-22 1936-04-22 Crystal holder
US77325A US2268365A (en) 1936-04-22 1936-05-01 Piezoelectric apparatus

Publications (1)

Publication Number Publication Date
GB479637A true GB479637A (en) 1938-02-09

Family

ID=41119701

Family Applications (2)

Application Number Title Priority Date Filing Date
GB4298/37A Expired GB479637A (en) 1936-04-22 1937-02-12 Improvements in or relating to piezoelectric crystals
GB4297/37A Expired GB471465A (en) 1936-04-22 1937-02-12 Improvements in or relating to piezo electric crystal devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4297/37A Expired GB471465A (en) 1936-04-22 1937-02-12 Improvements in or relating to piezo electric crystal devices

Country Status (4)

Country Link
US (2) US2123236A (en)
DE (2) DE735908C (en)
FR (1) FR820889A (en)
GB (2) GB479637A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482828A (en) * 1945-04-03 1949-09-27 Us Sec War Mounting for piezo electric elements
US2437218A (en) * 1946-01-28 1948-03-02 Premier Crystal Lab Inc Method and means for mounting piezo crystal plates
GB679575A (en) * 1950-01-20 1952-09-17 Standard Telephones Cables Ltd Improvements in or relating to piezo-electric crystal plates
US2931924A (en) * 1958-06-25 1960-04-05 Philip A Simpson Quartz oscillator unit for operation at low temperatures
US3201984A (en) * 1962-03-19 1965-08-24 Bendix Corp Electric sensors and circuits
FR2462055A1 (en) * 1979-07-18 1981-02-06 France Etat AUTOTHERMOSTATE HIGH FREQUENCY OSCILLATOR
US4373119A (en) * 1980-12-05 1983-02-08 Motorola, Inc. Adjustable transducer
JPS5984921U (en) * 1982-11-27 1984-06-08 株式会社村田製作所 Oscillator support structure
JPH06350376A (en) * 1993-01-25 1994-12-22 Matsushita Electric Ind Co Ltd Piezoelectric device air-tightly sealed and air-tight sealing package
EP0651449B1 (en) * 1993-11-01 2002-02-13 Matsushita Electric Industrial Co., Ltd. Electronic component and method for producing the same
DE69409215T2 (en) * 1993-12-06 1998-07-16 Matsushita Electric Ind Co Ltd Hybrid magnetic structure and its manufacturing process

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB239175A (en) * 1924-08-26 1926-09-30 Western Electric Co Ltd Improvements in piezo-electric frequency control devices
US1925577A (en) * 1930-10-17 1933-09-05 American Optical Corp Oscillating crystal
US2018246A (en) * 1934-10-09 1935-10-22 Westinghouse Electric & Mfg Co Quartz crystal manufacture

Also Published As

Publication number Publication date
FR820889A (en) 1937-11-20
US2268365A (en) 1941-12-30
GB471465A (en) 1937-09-06
DE735908C (en) 1943-06-01
US2123236A (en) 1938-07-12
DE756196C (en) 1953-02-16

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