Communications – electrical: acoustic wave systems and devices – Signal transducers – Receivers
Patent
1979-12-21
1982-01-12
Blum, Theodore M.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Receivers
73724, 361283, H04R 1900
Patent
active
043109063
ABSTRACT:
A broadband megahertz range electrostatic acoustic transducer for use in a liquid environment. A liquid-tight enclosure 11 which includes a metallic conducting membrane 18 as part of its outside surface has a means 19 inside the liquid-tight enclosure for applying a tension to the membrane and for mounting an electrode 23 such that the flat end of the electrode is approximately parallel to the membrane. The invention includes structure and a method for ensuring that the membrane 18 and the flat end of the electrode 23 are exactly parallel and a fixed predetermined distance from each other.
REFERENCES:
patent: 3222581 (1965-12-01), Lenfant
patent: 3418546 (1968-12-01), Beavers et al.
Breazeale Mack A.
Cantrell, Jr. John H.
Heyman Joseph S.
Torbett Michael A.
Yost William T.
Blum Theodore M.
King William H.
Manning John R.
Osborn Howard J.
The United States of America as represented by the Administrator
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