Moving-armature electromagnetic device

Details Moving-armature electromagnetic device Moving-armature electromagnetic device

Filed on

1978-07-31

Date issued

1979-12-04

Examiner

Harris, George

Patent Class

Electricity: magnetically operated switches, magnets, and electr

SubClass

Magnets and electromagnets

SubSubClass

With magneto-mechanical motive device

Other Related Categories

335258, H01F 712

Type

Patent

Status

active

Patent number

041774400

Description

ABSTRACT:
The invention relates to a moving-armature electro-magnetic device such as a plunger core electromagnet wherein a ring of a non-magnetic material with an appropriate anti-friction coefficient is placed between the armature and the seat which cooperates with said armature. Said ring permits to reduce to a minimum both the frictional forces and the remanence forces between said armature and said seat.

REFERENCES:
patent: 985676 (1911-02-01), Howe
patent: 3400351 (1968-09-01), Flentge

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