Flux shielded solenoid

Details Flux shielded solenoid Flux shielded solenoid

1978-09-22

1980-11-11

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335301, H01F 708

Patent

active

042335833

ABSTRACT:
A solenoid is disclosed in which a ferromagnetic shield substantially surrounds the circumferential surface of the coil in order to provide a high-permeability flux path on the coil exterior. The shield is formed by a ferromagnetic collar and the body part of a bracket. The ferromagnetic collar extends partially around the coil, and the body part of the bracket faces a longitudinal opening in the ferromagnetic collar. The ferromagnetic collar is embedded in a molded epoxy encapsulation, which is found to be reinforced by the collar. Alternatively, the shield can be formed exclusively of a ferromagnetic collar that extends substantially around the entire periphery of the coil.

REFERENCES:
patent: 1641473 (1927-09-01), Chylinski
patent: 2628342 (1953-02-01), Taylor
patent: 2988715 (1961-01-01), Gizynski et al.
patent: 3082359 (1963-03-01), Mangiafico
patent: 3196322 (1965-07-01), Harper
patent: 3295079 (1966-12-01), Brown
patent: 3331042 (1967-07-01), Erickson et al.
patent: 3332049 (1967-07-01), Hisano
patent: 3381251 (1968-04-01), Fuller
patent: 3507039 (1970-04-01), Craige
patent: 3551864 (1970-12-01), Sweeney et al.
patent: 3593241 (1971-07-01), Ludwig
patent: 3598360 (1971-08-01), Merriner
patent: 3774298 (1973-11-01), Eley
patent: 4054854 (1977-10-01), Marsden

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