Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1976-03-22
1977-12-20
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335 78, H01H 5122
Patent
active
040644715
ABSTRACT:
An electromechanical relay in which an electromagnetic actuator rotates a pivotally supported armature between a first position and a second position by energizing the actuator and rotates the armature back to the first position by de-energizing the actuator. The actuator comprises an electromagnet including a core, a winding on the core, and first and second pole pieces at the respective ends of the core, the pole pieces having pole faces adjacent the same surface of the armature but on opposite sides of the pivot. A permanent magnet is arranged such that a third pole piece forms one pole of the permanent magnet and the electromagnet forms the other pole of the permanent magnet, so that the first and second pole pieces are magnetically polarized to the opposite polarity relative to the third pole piece by the permanent magnet. The pole face of the second pole piece terminates substantially adjacent the pivot, while the pole face of the first pole piece terminates substantially away from the pivot. The third pole piece is positioned relative to the armature on the same side of the pivot as the second pole piece.
REFERENCES:
patent: 3121149 (1964-02-01), Richert
patent: 3317871 (1967-05-01), Adams
patent: 3484729 (1969-12-01), Adams et al.
patent: 3968470 (1976-07-01), Brown
patent: 4005298 (1977-01-01), Brown
Nelsen Marvin G.
Schuessler John C.
Tapp David J.
Harris George
Leach Corporation
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