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

1976-10-07

1977-09-20

Ruehl, Charles A.

Measuring and testing

Brake testing

Single wheel rotating and resistance measuring means

73143, 340272, G01L 500

Patent

active

040488500

ABSTRACT:
The present invention is related to a mechanism for guaging 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 of the trawl net in order to sense changes in the geometry of the mask. Each sensor includes a permanent magnet and a reed contact disposed to be activated by the magent 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: 3438249 (1969-04-01), Fukunaga
patent: 3683355 (1972-08-01), Collins
patent: 3759094 (1973-09-01), Al
W. C. Dillon & Co., Inc. Bulletin R-8, Nov. 1962, pp. 13-15.

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