High speed solenoid

Details High speed solenoid High speed solenoid

1990-10-10

1994-04-05

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335236, 335257, 335258, 335261, 335262, 335273, 335277, 335279, H01F 300, H01F 708

Patent

active

053009088

ABSTRACT:
A high-speed impact hammer type solenoid capable of operating at high speed such as 500 to 1000 strokes per second and with a relatively long stroke length. It is housed in a cylindrical shell and includes two separate coils and magnetic circuits operating on a single short plunger. The plunger is driven magnetically in both directions. The short plunger has reduced mass. This is made possible by elongated backstops extending through the coils to the plunger and by a flux washer extending from the shell to the plunger. Close control of the plunger stroke is achieved by a non-magnetic sleeve surrounding the plunger and spacing the backstops which are screw threaded into the shell. Resilient anti-residual pads on each side of the plunger absorb the impact of the plunger with the backstop, start the plunger in the opposite direction and speed up the decay of the magnetic field.

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Page 20 of Deltrol Controls Solenoid Brochure, FIG. 12. Brochure has no date. Is identified as "Engineering Specifications No. 1140-1." A copy is furnished herewith.

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