Permissive-make electromagnetic switch

Details Permissive-make electromagnetic switch Permissive-make electromagnetic switch

1977-01-13

1978-10-24

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335137, 335179, H01H 5122

Patent

active

041224205

ABSTRACT:
A permissive make double throw electromagnetic switch having maximum efficiency in utilizing electrical energy supplied thereto, though being extremely small and compact for use on printed circuit boards. The means for moving the contact actuator comprises a pivotal armature which carries a permanent magnet and a pole piece whereby the permanent magnet causes the pole piece to be drawn into engagement with the core of an electromagnetic winding to thereby move the armature to a retracted position. Energization of the winding causes the armature to be drawn into attracted position in engagement with the core, the flux path through the armature being directly through the core and other flux-conducting means.

REFERENCES:
patent: 3102974 (1963-09-01), Williams, Jr.
patent: 3109903 (1963-11-01), Lychyk
patent: 3317871 (1967-05-01), Adams
patent: 3800252 (1974-03-01), Aigner
patent: 4064471 (1977-12-01), Schuessler et al.

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