Ultra low frequency acoustic generator

Details Ultra low frequency acoustic generator Ultra low frequency acoustic generator

1976-07-28

1977-06-14

Tudor, Harold

Communications: electrical

Selective

Having indication or alarm

116137A, 181120, 340 12R, H04B 1300

Patent

active

040300633

ABSTRACT:
An underwater, ultra low frequency acoustic signal projector utilizes a pmatically powered signal generator wherein slide and poppet valves cooperate to effect pressure excursions on a piston connected to a water contacting signal generating piston.
The generator is constantly pneumatically referenced to ambient hydrostatic pressures by a pressure equilibrium control system. A compressor recycles generator exhaust to provide substantially bubble free operation.

REFERENCES:
patent: 1952690 (1934-03-01), Strom, Sr.
patent: 3105460 (1963-10-01), Bouyoucos
patent: 3143999 (1964-08-01), Bouyoucos
patent: 3212473 (1965-10-01), Bouyoucos
patent: 3516052 (1970-06-01), Bouyoucos
patent: 3803544 (1974-04-01), Wallen et al.

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