Electromagnetic force applying device

Details Electromagnetic force applying device Electromagnetic force applying device

1974-11-26

1976-05-04

Harris, G.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Temperature-responsive type

336 30, H01F 708

Patent

active

039551644

ABSTRACT:
An electromagnetic force applying device comprises a core with an annular air gap, a coil for creating a radial magnetic field in the air gap and an armature ring movable axially in the air gap. The core and the ring are of different magnetic materials with different coefficients of thermal expansion so that the force applied to the ring when a given current flows through the coil varies with temperature.

REFERENCES:
patent: 2446353 (1948-08-01), Wittmann
patent: 2794090 (1957-05-01), Ertl et al.
patent: 3009084 (1961-11-01), Balliett
patent: 3126518 (1964-03-01), Johannson
patent: 3533032 (1970-10-01), Schindel et al.

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