Trolling depth controller

Details Trolling depth controller Trolling depth controller

1980-11-20

1982-07-13

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

43 261, 43 274, 367106, 367108, G01S 1588, A01K 8900

Patent

active

043398111

ABSTRACT:
An automatic trolling depth controller is disclosed for a fishing boat employing a downrigger system. A sonar depth indicating unit with a sonar transducer continuously measures changing depth as the boat trolls. A depth control unit is connected thereto which automatically raises and lowers the trolling line via a reversible motor in response to depth indicating signals of the depth indicator unit so as to automatically maintain the end of the trolling line at a substantially constant given spacing from the bottom despite variations in lake depth as the fishing boat trolls.

REFERENCES:
patent: 2709868 (1955-06-01), Routh
patent: 3835571 (1974-09-01), Berry
patent: 3910524 (1975-10-01), Ireland
patent: 3922808 (1975-12-01), Rieth et al.
patent: 4004366 (1977-01-01), Berry
patent: 4079539 (1978-03-01), Holstein
patent: 4253165 (1981-02-01), Christiansen

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