GB531268A - Improvements relating to holders for piezo-electric devices - Google Patents

Improvements relating to holders for piezo-electric devices

Info

Publication number
GB531268A
GB531268A GB19448/39A GB1944839A GB531268A GB 531268 A GB531268 A GB 531268A GB 19448/39 A GB19448/39 A GB 19448/39A GB 1944839 A GB1944839 A GB 1944839A GB 531268 A GB531268 A GB 531268A
Authority
GB
United Kingdom
Prior art keywords
piezo
crystals
electrodes
electrode
electric
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
GB19448/39A
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.)
ERNEST LETT GARDINER
SIMMONDS DEV CORP Ltd
Original Assignee
ERNEST LETT GARDINER
SIMMONDS DEV CORP Ltd
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 ERNEST LETT GARDINER, SIMMONDS DEV CORP Ltd filed Critical ERNEST LETT GARDINER
Priority to GB19448/39A priority Critical patent/GB531268A/en
Priority to US343036A priority patent/US2242120A/en
Publication of GB531268A publication Critical patent/GB531268A/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

Abstract

531,268. Piezo-electric crystals; filter circuits. GARDINER, E. L., and SIMMONDS DEVELOPMENT CORPORATION, Ltd. July 4, 1939, No. 19448. [Classes 40 (iii) and 40 (v)] A piezo-electric crystal holder comprises an insulating plate 12 in two apertures of which are mounted piezo-electric crystals 17, 18 between a common electrode 19 and individual electrodes 20, 21. Mounted on a rotatable spindle 26 is a semicircular metal plate 25 which, with electrodes 20, 21, forms a differential condenser. Plate 25 is connected to electrode 19 by means of the spindle 26 and a screw washer 32. Each pair of electrodes may embrace a group of crystals. Fig. 4 shows a filter network employing a two-crystal holder in which adjustment of electrode 25 enables a desired value of capacity to be connected across either of the crystals 40, 41. Specification 509,040 is referred to.
GB19448/39A 1939-07-04 1939-07-04 Improvements relating to holders for piezo-electric devices Expired GB531268A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB19448/39A GB531268A (en) 1939-07-04 1939-07-04 Improvements relating to holders for piezo-electric devices
US343036A US2242120A (en) 1939-07-04 1940-06-28 Holder for piezoelectric devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19448/39A GB531268A (en) 1939-07-04 1939-07-04 Improvements relating to holders for piezo-electric devices

Publications (1)

Publication Number Publication Date
GB531268A true GB531268A (en) 1941-01-01

Family

ID=10129547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19448/39A Expired GB531268A (en) 1939-07-04 1939-07-04 Improvements relating to holders for piezo-electric devices

Country Status (2)

Country Link
US (1) US2242120A (en)
GB (1) GB531268A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516090A (en) * 1982-04-22 1985-05-07 Asahi Glass Company Ltd. Ultrasonic delay line
US5057182A (en) * 1990-01-19 1991-10-15 Sonokinetics Group Ultrasonic comb horn and methods for using same
US5171387A (en) * 1990-01-19 1992-12-15 Sonokinetics Group Ultrasonic comb horn and methods for using same
US6551337B1 (en) 1999-10-05 2003-04-22 Omnisonics Medical Technologies, Inc. Ultrasonic medical device operating in a transverse mode
US20040097996A1 (en) 1999-10-05 2004-05-20 Omnisonics Medical Technologies, Inc. Apparatus and method of removing occlusions using an ultrasonic medical device operating in a transverse mode
US20040158150A1 (en) * 1999-10-05 2004-08-12 Omnisonics Medical Technologies, Inc. Apparatus and method for an ultrasonic medical device for tissue remodeling
US6524251B2 (en) 1999-10-05 2003-02-25 Omnisonics Medical Technologies, Inc. Ultrasonic device for tissue ablation and sheath for use therewith
US7794414B2 (en) 2004-02-09 2010-09-14 Emigrant Bank, N.A. Apparatus and method for an ultrasonic medical device operating in torsional and transverse modes

Also Published As

Publication number Publication date
US2242120A (en) 1941-05-13

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