GB499707A - Piezo-electric vibration systems - Google Patents

Piezo-electric vibration systems

Info

Publication number
GB499707A
GB499707A GB14357/38A GB1435738A GB499707A GB 499707 A GB499707 A GB 499707A GB 14357/38 A GB14357/38 A GB 14357/38A GB 1435738 A GB1435738 A GB 1435738A GB 499707 A GB499707 A GB 499707A
Authority
GB
United Kingdom
Prior art keywords
masses
crystal
piezo
threaded
clamping ring
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
GB14357/38A
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 GB499707A publication Critical patent/GB499707A/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
    • H03H9/0504—Holders; Supports for bulk acoustic wave devices
    • 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

Abstract

499,707. Piezo - electric crystals. STANDARD TELEPHONES & CABLES, Ltd. May 13, 1938, No. 14357. Convention date, May 14, 1937. [Class 40 (v)] Additional masses 2, 3, Fig. 2, are clamped to two opposite faces of a crystal 1 to modify its natural frequency. The masses may be of metal such as steel, aluminium or those known under the Registered Trade Marks "Elinvar" and "Invar" and the frequency may be adjusted by altering the amount of an additional piece of solder &c. 4 fixed to the member 2. The masses 2, 3, Fig. 3, are cylindrical and threaded reversely to be engaged by a clamping ring 8, or they may be flanged as shown in Fig. 4 and pressed on to the crystal 1 by rings 7 over which the clamping ring 8 is threaded. The ring 8 may be provided with fixing lugs. A spring mounting enabling the pressure of the masses on the crystal to be varied may be provided. The Specification as open to inspection under Sect. 91 comprises also a "transformer" wherein several crystals separated by conducting or non-conducting discs are provided. It is also stated that the masses may be cemented to the crystal. This subject-matter does not appear in the Specification as accepted.
GB14357/38A 1937-05-14 1938-05-13 Piezo-electric vibration systems Expired GB499707A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR903471X 1937-05-14

Publications (1)

Publication Number Publication Date
GB499707A true GB499707A (en) 1939-01-27

Family

ID=9404642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14357/38A Expired GB499707A (en) 1937-05-14 1938-05-13 Piezo-electric vibration systems

Country Status (3)

Country Link
DE (1) DE903471C (en)
FR (1) FR832818A (en)
GB (1) GB499707A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755220C (en) * 1939-09-29 1953-12-14 Zeiss Carl Fa Piezoelectric coupling device for high frequency circuits

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR667387A (en) * 1928-04-19 1929-10-16 Improvements to frequency stabilizers
GB414764A (en) * 1933-02-13 1934-08-13 Marcel Charles Tournier Improvements in mechanical frequency standards such as piezoelectric crystals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755220C (en) * 1939-09-29 1953-12-14 Zeiss Carl Fa Piezoelectric coupling device for high frequency circuits

Also Published As

Publication number Publication date
DE903471C (en) 1954-02-08
FR832818A (en) 1938-10-04

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