GB477623A - Improvements in or relating to acoustic rectifying devices and to alternating current signalling systems incorporating such devices - Google Patents

Improvements in or relating to acoustic rectifying devices and to alternating current signalling systems incorporating such devices

Info

Publication number
GB477623A
GB477623A GB19888/36A GB1988836A GB477623A GB 477623 A GB477623 A GB 477623A GB 19888/36 A GB19888/36 A GB 19888/36A GB 1988836 A GB1988836 A GB 1988836A GB 477623 A GB477623 A GB 477623A
Authority
GB
United Kingdom
Prior art keywords
plate
piezo
frequency
electric
devices
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
GB19888/36A
Other languages
English (en)
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 GB477623A publication Critical patent/GB477623A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
GB19888/36A 1935-08-01 1936-07-17 Improvements in or relating to acoustic rectifying devices and to alternating current signalling systems incorporating such devices Expired GB477623A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US34122A US2126886A (en) 1935-08-01 1935-08-01 Acoustic rectifying device

Publications (1)

Publication Number Publication Date
GB477623A true GB477623A (en) 1938-01-04

Family

ID=21874445

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19888/36A Expired GB477623A (en) 1935-08-01 1936-07-17 Improvements in or relating to acoustic rectifying devices and to alternating current signalling systems incorporating such devices

Country Status (5)

Country Link
US (1) US2126886A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE710803C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR815899A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB477623A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL48530C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416337A (en) * 1943-06-10 1947-02-25 Bell Telephone Labor Inc Vibration damping circuit
US4499566A (en) * 1981-01-21 1985-02-12 The United States Of America As Represented By The Secretary Of The Navy Electro-ceramic stack

Also Published As

Publication number Publication date
US2126886A (en) 1938-08-16
NL48530C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR815899A (fr) 1937-07-24
DE710803C (de) 1941-09-22

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