Solenoid

Details Solenoid Solenoid

1974-09-03

1976-03-30

Harris, G.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With motor

335 70, 68 17R, 222 70, H01H 900

Patent

active

039477886

ABSTRACT:
A solenoid coil is connected in series with an electric motor. The spring which urges the solenoid plunger away from the coil is of such strength that it will yield to the magnetic attraction of the coil when the motor-starting inrush current is flowing through the coil, but will not yield when the motor-running current is flowing through the coil. Thus the solenoid plunger reciprocates each time the motor is started. The solenoid plunger is formed of a flat sheet of magnetic material curled into the shape of a hollow cylindrical shell. The solenoid frame has a forked portion through which the plunger extends, the forked portion having sufficient depth to minimize side loading of the plunger. An end of the frame is also shaped to act as a spring in holding the solenoid parts in assembled relationship.

REFERENCES:
patent: 3079944 (1963-03-01), McLaughlin
patent: 3207373 (1965-09-01), Dannenmann
patent: 3262027 (1966-07-01), Zaleske et al.
patent: 3295079 (1966-12-01), Brown
patent: 3396354 (1968-08-01), Fisher
patent: 3593240 (1971-07-01), Garczynski
patent: 3665353 (1972-05-01), Campbell

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