Electromagnetically driven device

Details Electromagnetically driven device Electromagnetically driven device

1979-11-06

1982-03-09

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335230, 335261, H01F 708

Patent

active

043192114

ABSTRACT:
An electromagnetically driven device has a bobbin made of non-magnetic material and has an opening formed in its axial direction. A coil is wound on the bobbin for establishing a magnetic field inside and around the bobbin when electric current is supplied to the coil. A plunger made of magnetic material is inserted into the opening for movement in its axial direction. A magnet is attached to one end of the plunger for increasing the driving force of the plunger when electric current is supplied to the coil.

REFERENCES:
patent: 3203447 (1965-08-01), Bremmer et al.
patent: 3504320 (1970-03-01), Engdahl et al.
patent: 3636850 (1972-01-01), Kikuchi et al.
patent: 4121235 (1978-10-01), Fujita et al.
patent: 4171897 (1979-10-01), Fujita et al.

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