Self-sustaining solenoid

Details Self-sustaining solenoid Self-sustaining solenoid

1982-04-14

1983-12-06

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335 79, 335230, H01H 716

Patent

active

044196431

ABSTRACT:
A self-sustaining solenoid which is adapted so that when applying an operating current to a coil, a moving iron core disposed in the coil is attracted into contact with a fixed receiver. A magnetic yoke is provided to extend between the fixed receiver and the end portion of the moving iron core projecting out of the coil, and a permanent magnet is disposed on the magnetic yoke at least at one end in the direction of movement of the moving iron core. When the moving iron core is held in contact with the fixed receiver, magnetic fluxes emanating from the permanent magnet mostly pass through the moving iron core, the fixed receiver and the magnetic yoke, and even if the operating current is cut off, the moving iron core is retained in contact with the fixed receiver. A magnetic gap is provided through which the magnetic fluxes of the permanent magnet mostly pass when the moving iron core is out of contact with the fixed receiver, and magnetic flux resulting from the application of the operating current pass through the magnetic gap.

REFERENCES:
patent: 3381181 (1968-04-01), Weathers
patent: 3814376 (1974-06-01), Reinicke
patent: 4127835 (1978-11-01), Knutson
patent: 4253493 (1981-03-01), English
patent: 4306270 (1981-12-01), Tada et al.

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