Magnetic latch with shunt path barrel

Details Magnetic latch with shunt path barrel Magnetic latch with shunt path barrel

1976-02-09

1976-12-28

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Latching means

335174, H01H 920

Patent

active

040004813

ABSTRACT:
An electrically releasable permanent magnet latch includes a magnetic tube disposed within a U-shaped magnetic form. Disposed within the tube are a lightweight armature and a coil spring biasing the armature forward. An electromagnet coil is wound about the rear portion of the tube and a pair of permanent magnets are inside the frame along side the front portions of the tube. Energization of the coil creates a flux which bucks the permanent magnet flux to permit the spring to overcome the armature holding force whereby the spring operates the armature.

REFERENCES:
patent: 3022450 (1962-02-01), Chase
patent: 3683239 (1972-08-01), Sturman
patent: 3783423 (1974-01-01), Mater et al.
patent: 3792390 (1974-02-01), Boyd
patent: 3886507 (1975-05-01), Johnston et al.

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