Electromagnetic driven device

Details Electromagnetic driven device Electromagnetic driven device

1980-02-08

1981-09-08

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335236, H01F 708

Patent

active

042887712

ABSTRACT:
An electromagnetically driven device has a coil and a plunger movably inserted in the coil between an inserted and ejected positions. An armature carrying a permanent magnet is provided at one end of the coil for holding the plunger in the inserted position by a magnetic attractive force developed between the armature and the plunger when the coil is deenergized. A yoke is provided between the permanent magnet and the armature for establishing a magnetic circuit therebetween with a predetermined reluctance developed between the armature and the yoke.

REFERENCES:
patent: 3302146 (1965-03-01), Zocholl
patent: 3755766 (1973-08-01), Read
patent: 3775715 (1973-11-01), Bosch et al.
patent: 4020433 (1977-04-01), Uchidoi et al.
patent: 4238749 (1980-12-01), Lawson et al.

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