Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1983-06-16
1985-04-30
Tudor, Harold J.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367148, 367153, 367189, 181113, H04R 1700
Patent
active
045148341
ABSTRACT:
An expendable sound source provides a cost effective projection of acoustic nergies in the ocean. A tubular housing contains a d.c. motor that locates its shaft coaxial with the housing. Cylindrically-shaped camming blocks engage spurs in a pair of rigid pistons at both ends of the tubular housing to reciprocate them in accordance with the pattern of the camming surfaces and the motor speed. A flywheel on the shafts and journaling supports assure the projection of arbitrary waveforms and a key-and-keyway cooperation between the housing and prevents the pistons turning in the housings. A self-contained, high energy battery pack is actuated by magnetic reed switch to assure reliable long term projection after deployment. Pressure compensation can be included.
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Hanson Paul A.
Walton James M.
Beers R. F.
Johnston E. F.
Keough T. G.
The United States of America as represented by the Secretary of
Tudor Harold J.
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