GB553050A - Piezoelectric crystal elements - Google Patents

Piezoelectric crystal elements

Info

Publication number
GB553050A
GB553050A GB4160/42A GB416042A GB553050A GB 553050 A GB553050 A GB 553050A GB 4160/42 A GB4160/42 A GB 4160/42A GB 416042 A GB416042 A GB 416042A GB 553050 A GB553050 A GB 553050A
Authority
GB
United Kingdom
Prior art keywords
degrees
axis
major
electrodes
points
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
GB4160/42A
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 GB553050A publication Critical patent/GB553050A/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
    • H03H9/02007—Details of bulk acoustic wave devices
    • H03H9/02157—Dimensional parameters, e.g. ratio between two dimension parameters, length, width or thickness
    • 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

Abstract

553,050. Piezo-electric crystals. STANDARD TELEPHONES & CABLES, Ltd. March 28, 1942, No. 4160. Convention date, Dec. 14, 1940. [Class 40 (v)] A rectangular piezoelectric crystal plate 1 having a low temperature co-efficient of frequency when vibrating in a longitudinal mode at a frequency which is mainly determined by its length, has its major plane substantially parallel to the X axis of the natural crystal, while the major axis X<11> of the element is inclined at an angle of 45 degrees or 135 degrees to the X axis and at an angle between 64 degrees and 70 degrees to the Z axis, the ratio of the width W to the length L having a value between .2 and 1.0. The thickness is chosen to give the desired impedance. The crystal has one or two electrodes on each major face and may be clamped at points 6 along the nodal line, for example as in Specification 467,724 or may be held by spring wire leads soldered to the electrodes at these points. Specification 540,184 also is referred to.
GB4160/42A 1940-12-14 1942-03-28 Piezoelectric crystal elements Expired GB553050A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US370127A US2272994A (en) 1940-12-14 1940-12-14 Piezoelectric crystal element

Publications (1)

Publication Number Publication Date
GB553050A true GB553050A (en) 1943-05-05

Family

ID=23458334

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4160/42A Expired GB553050A (en) 1940-12-14 1942-03-28 Piezoelectric crystal elements

Country Status (2)

Country Link
US (1) US2272994A (en)
GB (1) GB553050A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185630A (en) * 1960-12-01 1965-05-25 Babcock & Wilcox Co Boiling coolant reactor with integral vapor separation and nuclear superheat

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470737A (en) * 1944-08-29 1949-05-17 Premier Crystal Lab Inc Method and means of finishing piezoelectric crystals
US2486187A (en) * 1947-04-09 1949-10-25 Bell Telephone Labor Inc Piezoelectric crystal apparatus
US4633124A (en) * 1982-03-16 1986-12-30 Kabushiki Kaisha Daini Seikosha Mount for quartz crystal resonator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185630A (en) * 1960-12-01 1965-05-25 Babcock & Wilcox Co Boiling coolant reactor with integral vapor separation and nuclear superheat

Also Published As

Publication number Publication date
US2272994A (en) 1942-02-10

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