Magnetic latch

Details Magnetic latch Magnetic latch

1991-11-26

1993-04-27

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335167, H01F 708

Patent

active

052066185

ABSTRACT:
A magnetic latch includes a coil, a frame receiving magnetic flux from the coil when energized, a latching member mounted in the frame and rotatably movable between first and second positions with the latching member providing a magnetic flux bridge between flux carrying means of the frame by contacting the flux carrying means with the latching member is in a first position, a magnet providing magnetic flux carried by the flux carrying means and a portion of the latching member for magnetically retaining the latching member is a first position with the coil is deenergized and a spring biasing the latching member towards a second position with force sufficient to overcome magnetic retention of the latching member at the first position when the coil is providing magnetic flux to the flux carrying members of the frame in the direction opposite of that of flux provided by the magnet.

REFERENCES:
patent: 695539 (1902-03-01), Cook
patent: 813638 (1906-02-01), Fretts
patent: 1907534 (1933-05-01), Fritcsons
patent: 3069602 (1962-12-01), Stout et al.
patent: 3114862 (1963-12-01), Rice
patent: 3984796 (1976-10-01), Gaskill
patent: 4538129 (1985-08-01), Fisher
patent: 5027093 (1991-06-01), Palmer et al.

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