Underwater camera

Details Underwater camera Underwater camera

1977-09-22

1979-05-08

Hix, L. T.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340 3R, 181124, G03B 1708, G01S 966

Patent

active

041533577

ABSTRACT:
An underwater camera in a pressure tight housing and a release mechanism for releasing the shutter at a predetermined distance from the sea bed. The release mechanism includes a transducer on the housing exterior for transmitting ultrasonic signals and receiving echo signals and an electronic circuit on the interior of the housing for opening the shutter in response to the echo signals when the camera has reached the predetermined distance from the sea bed.

REFERENCES:
patent: 3143049 (1964-08-01), Tholey
patent: 3261274 (1966-07-01), Smith
patent: 3522764 (1970-08-01), Biber et al.
patent: 3738248 (1973-06-01), Fish et al.
patent: 3750547 (1973-08-01), Walthier et al.
patent: 3899790 (1975-08-01), Pocachard
patent: 4035816 (1977-07-01), Winnacker

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