Underwater transmitter apparatus

Details Underwater transmitter apparatus Underwater transmitter apparatus

1990-04-13

1991-04-23

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Transmitter systems

367131, H04B 102

Patent

active

050105299

ABSTRACT:
Underwater signal apparatus includes a waterproof housing having two chambers, a sealed chamber in which is disposed a transducer and electrical circuitry associated with the transducer. In the second chamber is a battery for providing the necessary electrical power for the transducer and its circuitry. The battery compartment is accessible for changing the battery. The transducer comprises one wall of the sealed chamber and is thus in direct contact with the water. The transducer circuitry is activated by a magnet movable on the housing. Within the sealed chamber in the housing is a magnetic read switch which is closed by the proximity of the magnet movable on the exterior of the housing.

REFERENCES:
patent: 3267414 (1966-08-01), Kritz
patent: 3337841 (1967-08-01), Wainwright et al.
patent: 3467414 (1969-09-01), Downing
patent: 3469231 (1969-09-01), Gaeiling et al.
patent: 3686656 (1972-08-01), Richards
patent: 3986161 (1976-10-01), Mackellar
patent: 4095667 (1978-06-01), Mahig, et al.
patent: 4281404 (1981-07-01), Morrow
patent: 4635242 (1987-01-01), Hart

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