Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1982-12-01
1985-12-03
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
181120, 116137A, G01V 138, G01V 104, H04B 1100
Patent
active
045569630
ABSTRACT:
An underwater sound generator comprising dual opposed pistons in a housing. Dynamic seal assemblies of flexible waterproof material are compressed against the peripheries of the pistons and the housing and form a watertight seal that allows axial motion. Controllers regulate the delivery of pressurized hydraulic fluid to hydraulic actuators which drive the axial motion of the pistons according to a predetermined variation.
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G. D. Hugus, III, "Development of Hydraulically Powered Low Frequency, Unwater Sound Projectors", J. Acoustical Society of America, Supple. 1, vol. 70, Fall 1981, pp. 519-520.
Hugus George D.
Young A. Mark
Beers Robert F.
Ellis William T.
Guenzer Charles S.
Lobo Ian J.
Moskowitz Nelson
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