Solenoid having a multi-piece armature

Details Solenoid having a multi-piece armature Solenoid having a multi-piece armature

1981-02-27

1982-04-27

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335259, 251129, H01F 713, H01F 716

Patent

active

043273459

ABSTRACT:
An electromagnetic solenoid is adapted to open and close an associated valve or to reciprocally engage a slideable member. The solenoid includes an electromagnetic and multi-piece armature enclosed within a protective housing. The armature comprises an inner pole piece operatively connected to an outer pole piece to initially provide a multi-level air gap with respect to the electromagnet. The inner pole piece is telescopically received within the outer pole piece and may over-travel the outer pole piece once the motion of the outer pole piece has ceased.

REFERENCES:
patent: 2881367 (1959-04-01), Watson
patent: 2895090 (1959-07-01), Short
patent: 3473780 (1969-10-01), Harms
patent: 3763412 (1973-10-01), Detrick et al.
patent: 3805099 (1974-04-01), Kelly
patent: 3961298 (1976-06-01), Jaffe et al.

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