Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Polarity-responsive
Patent
1995-08-07
1996-12-24
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Polarity-responsive
335 83, H01H 5122
Patent
active
055876935
ABSTRACT:
A polarized electromagnetic relay includes a base, an electromagnet with a coil and a pair of pole pieces extending perpendicularly from the end of said coil, a balanced armature and spring system which when actuated pivots between two fixed contact points and a permanent magnet inducing the same magnetic poles in both of said pole pieces and providing an opposite pole in closely adjacent relationship to the central portion of the armature. A movable contact spring is fixedly connected to the armature, said spring forming contact arms at either armature end portion and a pair of torsion pivot arms extending transversely in opposite directions along the pivot axis of said armature, the distal ends of either pivot arm being fixedly connected to a support extending on either side of the armature from a coil bobbin. Further, a flexible movable braid connects the movable contacts on said movable spring to each other and to a movable contact terminal. Two identical coils wound in a common direction are provided as the means for actuation. Armature transfer will occur by either applying a voltage pulse across the appropriate coil, or by toggling the voltage pulse polarity across the two coils connected in series.
REFERENCES:
patent: 4993787 (1991-02-01), Tanaka et al.
patent: 5153543 (1992-10-01), Hitachi et al.
Donovan Lincoln
Paschburg Donald B.
Siemens Electromechanical Components, Inc.
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