Sonar systems

Details Sonar systems Sonar systems

1989-02-09

1990-01-30

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367104, 367179, 33378, 33396, H04R 1500

Patent

active

048978248

ABSTRACT:
A sonar system for a water craft including a transducer assembly mounted to the hull of the water craft, and a control circuit for applying signals to the transducer for forward transmission by the transducer and for sensing signals reflected from objects forwardly of the craft and for causing actuation of an alarm. The transducer assembly is mounted for pivotal movement relative to the hull such that during pitching motion of the craft, the signals transmitted by the transducer remain in a horizontal plane.

REFERENCES:
patent: 1348538 (1920-08-01), Blake
patent: 2703397 (1955-03-01), Ruble
patent: 2722056 (1955-11-01), Stimler
patent: 2832944 (1958-04-01), Kessler
patent: 3518676 (1970-06-01), Kirkness
patent: 3563335 (1971-02-01), Holmes et al.
patent: 3980984 (1976-09-01), Bridge
patent: 4096638 (1978-06-01), Schimming
patent: 4144518 (1979-03-01), Minohara et al.

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