Magnetically latching solenoid apparatus

Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Plural magnets or flux sources

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335177, 335229, 335230, 335231, 335232, 335233, 335234, H01H 900

Patent

active

058835571

ABSTRACT:
A magnetically latching solenoid apparatus is characterized by a non-magnetic armature carrying a permanent magnet having poles aligned with the throw axis of the device. The poles of the magnet are substantially aligned with corresponding pole pieces and define respective variable air gaps therebetween. The apparatus assumes one of two bistable magnetically latched states according to the one of the air gaps across which the magnetic attractive force exceeds the magnetic attractive force across the other of the air gaps. Single or dual winding coils temporally excitable unidirectionally or bidirectionally and, in the case of dual winding coils mutually exclusively or contemporaneously, to cause the latch state to change.

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patent: 4829947 (1989-05-01), Lequesne
patent: 5024247 (1991-06-01), Lembke
patent: 5272458 (1993-12-01), Hoffman et al.
patent: 5365210 (1994-11-01), Hines

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