Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Plural magnets or flux sources
Patent
1984-01-13
1986-04-08
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Plural magnets or flux sources
335 85, H01H 5127
Patent
active
045815976
ABSTRACT:
An electromagnetic actuator is presented wherein a pair of permanent magnets are sandwiched between respective pairs of pole pieces. The pole pieces communicate with an armature to effect the state of actuation of the actuator. A pair of electromagnets, consisting of a wire-wound core, is maintained in close relationship to the pair of permanent magnets, a pole piece separating each permanent magnet from its associated electromagnet. When the electromagnets are not energized, the permanent magnets create a magnetic circuit which pulls the armature into a touch position with one pole piece of each permanent magnet. When the electromagnets are energized, a magnetic field is created which opposes and effectively cancels the magnetic fields of the permanent magnets, creating another magnetic circuit drawing the armature into a touch position with the other pole pieces. When the electromagnets are not energized, the armature is held in a first position by the permanent magnets alone. When energized, the holding power is achieved by the electromagnets, and the permanent magnets are effectively removed from the system.
REFERENCES:
patent: 3253095 (1966-05-01), Richert
patent: 3525958 (1970-08-01), Rauterburg
Broome Harold
Figgie International Inc.
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