Piston type underwater sound generator

Details Piston type underwater sound generator Piston type underwater sound generator

1956-02-29

1977-09-06

Tudor, Harold

Communications: electrical

Selective

Pulse responsive actuation

116 27, 181119, 254172, 340 8R, H04B 1300

Patent

active

040471489

ABSTRACT:
1. An apparatus for producing low frequency compressional waves under water hich comprises two circular plates spaced in opposed parallel relation, a plurality of reciprocating fluid motors arranged in parallel between said plates, an independent fluid pump hydraulically connected to each of said motors for driving the same, a by-pass valve for each motor adjustable to vary the length of the stroke of such motor, a prime mover coupled to drive all of the pumps in synchronism, whereby the motors connected thereto reciprocate in unison to move said plates toward and away from each other at a frequency corresponding to the speed of the prime mover, and means for adjusting all of the by-pass valves in assembly, whereby the amplitude of oscillation of said plates is correspondingly varied.

REFERENCES:
patent: 2148277 (1939-02-01), Rose
patent: 2587848 (1952-03-01), Horsley et al.

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