Mechanism for gauging the catch within a trawl net

Details Mechanism for gauging the catch within a trawl net Mechanism for gauging the catch within a trawl net

1979-09-28

1982-01-05

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

43 9, 73772, 73773, 73779, G01L 510

Patent

active

RE0308412

ABSTRACT:
The present invention is related to a mechanism for gauging the expansion of a trawl net in correspondence with the number of fish caught within the trawl. The mechanism includes sensors adapted to be fastened to the [masks] meshes of the trawl net in order to sense changes in the geometry of the [mask] meshes. Each sensor includes a permanent magnet and a reed contact disposed to be activated by the magnet as a result of a predetermined trawl net expansion, thereby transmitting a signal indicative of such expansion to a detection and indication mechanism located on board an associated trawler.

REFERENCES:
patent: 2079021 (1937-05-01), Malcolm et al.
patent: 2156452 (1939-05-01), Guyman
patent: 3366969 (1968-01-01), Luketa
patent: 3438249 (1969-04-01), Fukunaga
patent: 3444510 (1969-05-01), Tyndale et al.
patent: 3478462 (1969-11-01), Herbst et al.
patent: 3683355 (1972-08-01), Collins
patent: 3759094 (1973-09-01), Al
W. C. Dillon and Co. Inc., Bulletin R-8, Nov. 1962, pp. 13-15.

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