Method and device for detecting physical bottom contact for...

Details Method and device for detecting physical bottom contact for... Method and device for detecting physical bottom contact for...

2006-05-02

2006-05-02

Pham, Toan N. (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S984000, C073S796000, C114S230210

Reexamination Certificate

active

07038592

ABSTRACT:
A method and a device for detection of physical or approximately physical bottom contact for objects, for instance fishing tackles, which are dragged closely above or on a sea bottom, said method consisting of sensoring an alteration of a force acting on a tension sensor (4) as a consequence of a mass (7) coupled to the tension sensor (4) coming into physical contact with the bottom, said alteration being used as indication of bottom contact, and that frictional forces (F2) being due to the dragging of the mass (7) along the bottom mainly are taken up by means of a tension release means (8). The device comprise the mass (7) being suspended in a tension sensor (4) in such a manner that the sensor (4) is actuated by bottom contact, and at least one tension release means (8) connected to the mass (7) and adapted to take up forces caused by dragging of the mass above the bottom.

REFERENCES:
patent: 2507986 (1950-05-01), Liss
patent: 2975397 (1961-03-01), Edgerton
patent: 3418627 (1968-12-01), Lyons
patent: 3579182 (1971-05-01), Schneider
patent: 3859490 (1975-01-01), Fohey
patent: 4873523 (1989-10-01), Jones

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