Self-sustaining solenoid

Details Self-sustaining solenoid Self-sustaining solenoid

1980-05-07

1981-12-15

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335229, H01F 716

Patent

active

043062075

ABSTRACT:
By applying an operating current to an operating coil, a moving iron core disposed in the operating coil is attracted deeply thereinto to butt against a fixed receiver. By applying a return current to a return coil, the moving iron core is pulled away from the fixed receiver. At least one of the moving iron core and the fixed receiver is divided into two parts in the direction of travel of the permanent magnet and a permanent magnet is sandwiched between the two parts to couple them together. The permanent magnet is magnetized by an operating magnetic field set up by the operating current and demagnetized by the return current.

REFERENCES:
patent: 3505628 (1970-04-01), Allen
patent: 3775714 (1973-11-01), Heuer
patent: 4240055 (1980-12-01), Shimizu et al.

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