FR871634A - Electro-mechanical transformation device, more especially electro-acoustic, composed of piezoelectric elements - Google Patents

Electro-mechanical transformation device, more especially electro-acoustic, composed of piezoelectric elements

Info

Publication number
FR871634A
FR871634A FR871634DA FR871634A FR 871634 A FR871634 A FR 871634A FR 871634D A FR871634D A FR 871634DA FR 871634 A FR871634 A FR 871634A
Authority
FR
France
Prior art keywords
electro
acoustic
piezoelectric elements
transformation device
mechanical transformation
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
Other languages
French (fr)
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Application granted granted Critical
Publication of FR871634A publication Critical patent/FR871634A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
FR871634D 1940-04-20 1941-04-19 Electro-mechanical transformation device, more especially electro-acoustic, composed of piezoelectric elements Expired FR871634A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE218129X 1940-04-20

Publications (1)

Publication Number Publication Date
FR871634A true FR871634A (en) 1942-05-02

Family

ID=5831121

Family Applications (2)

Application Number Title Priority Date Filing Date
FR871634D Expired FR871634A (en) 1940-04-20 1941-04-19 Electro-mechanical transformation device, more especially electro-acoustic, composed of piezoelectric elements
FR51579D Expired FR51579E (en) 1940-04-20 1941-05-17 Electro-mechanical transformation device, more especially electro-acoustic, composed of piezoelectric elements

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR51579D Expired FR51579E (en) 1940-04-20 1941-05-17 Electro-mechanical transformation device, more especially electro-acoustic, composed of piezoelectric elements

Country Status (4)

Country Link
US (1) US2368609A (en)
CH (1) CH218129A (en)
DE (1) DE946820C (en)
FR (2) FR871634A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594841A (en) * 1945-08-11 1952-04-29 Brush Dev Co Piezoelectric transducer with pushpull and feedback circuit
US2978597A (en) * 1956-03-14 1961-04-04 Harris Transducer Corp Circuit element transducer
FR1213677A (en) * 1958-09-27 1960-04-04 Realisations Ultrasoniques Sa Enhancements to magnetostriction transducers
US3321648A (en) * 1964-06-04 1967-05-23 Sonus Corp Piezoelectric filter element
CH492968A (en) * 1968-07-30 1970-06-30 Kistler Instrumente Ag Process for the production of piezoelectric measuring cells and measuring cell obtained by the process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB409040A (en) * 1932-11-01 1934-04-26 Brush Dev Co Improvements in or relating to piezo electric microphones or speakers

Also Published As

Publication number Publication date
CH218129A (en) 1941-11-30
FR51579E (en) 1943-02-05
DE946820C (en) 1956-08-09
US2368609A (en) 1945-01-30

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