Trip solenoid

Details Trip solenoid Trip solenoid

1983-03-02

1984-04-10

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335234, H01F 708

Patent

active

044424183

ABSTRACT:
An electric trip solenoid employs a pair of low-cost retaining or holding magnets in an open frame arrangement in which the magnets are positioned on opposite sides of the flat surfaces of a pole and in contact with the pole and the legs of an open frame. The magnets are thickness oriented so as to distribute their flux through relatively large areas avoiding regions of high flux density. In one embodiment the release point may be adjusted by rotating a screw in a closure plate to vary the reluctance of the secondary flux path therethrough.

REFERENCES:
patent: 3755766 (1973-08-01), Read, Jr.
patent: 3772540 (1973-11-01), Benson
patent: 3886507 (1975-05-01), Johnston et al.
patent: 3944957 (1976-03-01), Kotos et al.
patent: 4000481 (1976-12-01), Pang
patent: 4072918 (1978-02-01), Read, Jr.
patent: 4288771 (1981-09-01), Ueda et al.

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