Depth finding apparatus

Details Depth finding apparatus Depth finding apparatus

1979-08-27

1981-07-28

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367910, G01S 1514

Patent

active

042814049

ABSTRACT:
A hand held, self-contained depth finding device is immersible into water for transmitting and receiving sonic impulses in the direction the device is aimed. The device includes a hand grip carrying a battery cartridge and an external trigger for operating a power switch within the waterproof interior. A liquid crystal display registers the measured depth in feet.

REFERENCES:
patent: 2935728 (1960-05-01), Morgan
patent: 3079583 (1963-02-01), Beitscher et al.
patent: 3267414 (1966-08-01), Kritz
patent: 3588795 (1971-06-01), Linardos et al.
patent: 3948086 (1976-04-01), Kitada

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