Solenoid device

Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device

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335261, 400212, H01F 708

Patent

active

047453869

ABSTRACT:
An improved solenoid wherein the volume of a secondary air gap is increased during the plunger stroke, in order to reduce the increased plunger force that would otherwise occur during the plunger stroke.

REFERENCES:
patent: 4308794 (1982-01-01), Adamoli et al.
patent: 4331010 (1982-05-01), Mitter
patent: 4395148 (1983-07-01), Gruner et al.
patent: 4505604 (1985-03-01), Takemoto
patent: 4529326 (1985-07-01), Mattsson
patent: 4557193 (1985-12-01), Mattsson
patent: 4600322 (1986-07-01), Vermet-Gaud et al.
patent: 4619536 (1986-10-01), Takemoto
IBM Tech. Disc. Bulletin, "Performance Stabilization of Magnetic Actuator", Mitts et al., vol. 15, No. 8, Jan. 1973, p. 2356.
IBM Tech. Disc. Bulletin, "Impression Control for a Typewriter", Simpson, vol. 24, No. 12, May 1982, pp. 6528-6529.

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