Automatically surfacing marker buoy for lobster or crab traps or

Details Automatically surfacing marker buoy for lobster or crab traps or Automatically surfacing marker buoy for lobster or crab traps or

1978-08-24

1981-04-21

Blix, Trygve M.

Ships

Building

Canal and ferry boats

9 9, 43100, 114326, 102 10, B63B 2152, B63B 5102

Patent

active

042623790

ABSTRACT:
A marker buoy attached to an object such as a lobster or crab trap by a latch and released by a trigger struck by a falling weight. A sealed buoy compartment contains a first permanent magnet holding the weight in upper position by a supportive pole relationship to the poles of a second permanent magnet on the weight and releasing the weight when the first magnet is pivoted to a relative position of poles not sufficiently supportive of the weight. The first magnet is pivoted by an electric motor controlled by an electric clock. Setting of the clock and other operations are accomplished without disturbing compartment seals by an external hand-held magnet operating on internal magnetic reed switches. A line tethers the buoy to the object when the latch is released.

REFERENCES:
patent: 2949853 (1960-08-01), Vogt
patent: 3228332 (1966-01-01), Snyder
patent: 3622962 (1971-11-01), Winget
patent: 4141295 (1979-02-01), Campbell
patent: 4142442 (1979-03-01), Tuten

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