Underwater depth sounder with variable beam transducer

Details Underwater depth sounder with variable beam transducer Underwater depth sounder with variable beam transducer

1976-05-17

1978-04-11

Tudor, Harold

Communications: electrical

Selective

Having indication or alarm

340 3C, H04B 1300

Patent

active

040841502

ABSTRACT:
An improved depth sounder combines a multi-beam ultrasonic transducer with a multi-range selector switch with provisions for automatically selecting a particular beam pattern for a particular range setting. The relationship between beam patterns and depth ranges is uniquely chosen to provide equal areas of insonification at each full scale range setting. The inventive system also provides an additional scale on the multi-scale range dial which shows the diameter of the insonified region in the vicinity of the reflecting target in addition to the target depth.

REFERENCES:
patent: 2545922 (1951-03-01), Gray
patent: 2729765 (1956-01-01), Saunders
patent: 2769160 (1956-10-01), Fryklund
patent: 2875355 (1959-02-01), Petermann
patent: 3086195 (1963-04-01), Halliday
patent: 3090030 (1963-05-01), Schuck
patent: 3277451 (1966-10-01), Parssinen
patent: 3307141 (1967-02-01), Saxton et al.
patent: 3457543 (1969-07-01), Akervold et al.
patent: 3681747 (1972-08-01), Walsh
patent: 3942149 (1976-03-01), Westfall, Jr.
patent: 3953824 (1976-04-01), Dean

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