Hollow cylindrical movable body for an electromagnet

Details Hollow cylindrical movable body for an electromagnet Hollow cylindrical movable body for an electromagnet

1985-09-03

1988-05-24

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335279, H01F 708

Patent

active

047468874

ABSTRACT:
An electromagnet includes a lightweight movable body in the form of a hollow cylindrical body. The resistances of circulation paths for eddy currents flowing in the movable body due to electromagnetic induction are increased to suppress the eddy currents. Excitation coils are connected parallel to each other to reduce the coil inductance for increasing the magnetic forces to attract the movable body and the response thereof.

REFERENCES:
patent: 2448727 (1948-09-01), Oetzel
patent: 3013189 (1961-12-01), Bernier
patent: 3553618 (1971-01-01), Lang
patent: 4067541 (1978-01-01), Hunter
patent: 4438419 (1984-03-01), Helinski

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