Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1978-11-30
1980-05-13
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
181120, 340404, 116137R, H04B 1300
Patent
active
042030897
ABSTRACT:
An underwater transducer which includes a fluid circuit having a valve disposed in a plenum chamber having a small aperture open to the ambient water pressure. Fluid flow into and out of the chamber by way of the valve is governed by controlling the valve opening and closing in accordance with movement of an electrodynamic driver which receives an input signal to be transmitted.
REFERENCES:
patent: 2773482 (1956-12-01), Dickie
patent: 2792804 (1957-05-01), Bouyoucos et al.
patent: 3212473 (1965-10-01), Bouyoucos
patent: 3275977 (1966-09-01), Bouyoucos
patent: 3349367 (1967-10-01), Wisatsky
patent: 3382841 (1968-05-01), Bouyoucos
patent: 3392369 (1968-07-01), Dickie et al.
patent: 3461910 (1969-08-01), Selsam et al.
patent: 3978940 (1976-09-01), Bouyoucos
patent: 4047148 (1977-09-01), Hagemann
Wallen et al., "Appres: A Very Low . . . System," 9/24/70, pp. 17-19, IEEE Conf. on Engineering in the Ocean Environment, Panama City, Fla. _
Moskowitz Nelson
Schron D.
Westinghouse Electric Corp.
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