Constant force solenoid

Details Constant force solenoid Constant force solenoid

1975-05-23

1976-10-19

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335261, H01F 708

Patent

active

039873854

ABSTRACT:
A solenoid in which the coil is positioned inside a housing of magnetic material. The housing has a tubular projection forming a recess in the inside of the end wall along the axis of the coil, one end of the plunger projecting beyond the coil into the recess when the plunger is in the energized position. The portion of the plunger that extends into the recess is tapered to obtain a constant force-displacement characteristic for the full travel of the plunger.

REFERENCES:
patent: 1436639 (1922-11-01), Bindschedler
patent: 2853659 (1958-09-01), Herion
patent: 3378732 (1968-04-01), Dietz et al.
patent: 3593240 (1971-07-01), Garczynski

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