Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1983-05-20
1984-10-09
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335281, H01F 708
Patent
active
044764510
ABSTRACT:
The solenoid actuator of this invention is provided with a magnetic flanged member for reinforcing the bobbin structure and reducing the magnetic resistance having a flanged portion and a cylindrical portion and inserted said cylindrical portion, whose inner surface is coated with a thin film made of feeble or non-magnetic and wear-resistant material, into the central aperture in a non-magnetic reel-shaped bobbin wound therearound with an energizing coil, and a movable core inserted into the central aperture in the bobbin is guided along the cylindrical portion of the flanged member, whereby the frictional abrasion caused by the sliding movement between the cylindrical portion of the flanged member and the movable core is suppressed and the frictional force caused by the uneven abutment between the outer surface of the movable core and the inner surface of the cylindrical portion of the flanged member is made relatively small to suppress the reduction of the attraction force between the stationary core and the movable core and thereby attaining a smooth operation of the movable core.
REFERENCES:
patent: 4149132 (1979-04-01), Richter et al.
patent: 4233585 (1980-11-01), Sugimoto et al.
Harris George
Shoketsu Kinzoku Kogyo Kabushiki Kaisha
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