Polarized electromagnetic device

Details Polarized electromagnetic device Polarized electromagnetic device

1980-04-04

1984-10-23

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335230, H01F 700

Patent

active

044791038

ABSTRACT:
In an electromagnetic device a magnet arrangement is provided having an electromagnet and a permanent magnet, with the pole faces of the permanent magnet abutting the core of the electromagnet on both sides of the end portions of the coil of the electromagnet and the end portions of the core of the electromagnet forming or supporting the pole pieces of the magnet arrangement. The poles of the permanent magnet are adjacent the like poles of the electromagnet when the electromagnet is energized, and the maximum value of the energizing current of the electromagnet is sufficient but not greater than necessary for reaching the first practical saturation value of flux density in the pole ends of the core of the magnet arrangement with the permanent magnet removed therefrom.

REFERENCES:
patent: 3089064 (1963-05-01), DeBennetot
patent: 3146381 (1964-08-01), Moreau
patent: 3281739 (1966-10-01), Grengg
patent: 3302146 (1967-01-01), Zocholl
patent: 3544935 (1970-12-01), Sterff
patent: 3715695 (1973-02-01), Hofman
patent: 4240055 (1980-12-01), Shimizu et al.

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