Electromagnetic device

Details Electromagnetic device Electromagnetic device

1982-03-08

1984-05-29

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335247, 335262, H01F 708

Patent

active

044518099

ABSTRACT:
A solenoid for use with an alternating current power supply has a stationary pole piece and a movable armature provided with an axially extending food means comprising in one embodiment a ring of nonmagnetic material and in another embodiment a plurality of ferromagnetic lugs on the end adjacent the pole piece. The lugs are disposed in peripherally spaced arrangement and extend axially from the armature in the region of contact with the pole piece to prevent rocking and orbiting buzz. The armature optionally includes a shading ring and/or slot extending a portion of the length thereof.

REFERENCES:
patent: 1226748 (1917-05-01), Burnham
patent: 1385181 (1921-07-01), Lorenz
patent: 1650799 (1927-11-01), Lee
patent: 3348147 (1967-10-01), Erickson et al.

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