Acoustic wave transducer with automatic compensation of the stat

Details Acoustic wave transducer with automatic compensation of the stat Acoustic wave transducer with automatic compensation of the stat

1976-10-18

1978-02-14

Tudor, Harold

Communications: electrical

Selective

Having indication or alarm

340 7PC, 340 10, 340 12R, H04B 1300

Patent

active

040742245

ABSTRACT:
Acoustic wave transducer comprising a sensitive element subjected on one face to the pressure variations of an external medium and on the other face to the pressure prevailing in an inner cavity of the body of the transducer, associated with automatic regulation means whereby said cavity communicates either with the external medium or with a source of fluid at a pressure exceeding that of the external medium, depending on the pressure level in said cavity as compared to that of the external medium.

REFERENCES:
patent: 2404785 (1946-07-01), Bostwick et al.
patent: 2444049 (1948-06-01), King
patent: 2451968 (1948-10-01), Murdock, Jr.
patent: 3235835 (1966-02-01), Del Guidice et al.
patent: 3489995 (1970-01-01), Laurent
patent: 3623507 (1971-11-01), Vogg et al.

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