Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1984-12-04
1987-04-07
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335269, H01F 708
Patent
active
046564489
ABSTRACT:
Solenoid for use in harsh difficult environmental conditions for actuation in a pulling motion along a straight line where the magnetic core travels within a stainless steel non-magnetic sleeve. The core uses a plurality of broad Teflon rings fitted in broad annular grooves to reduce friction and wear along its path of travel, to reduce cross-section tangential point to point contact wear, and to prevent sacrificial corrosion of the moveable magnetic core or sleeve due to galvanic action when moisture is present. The core is zinc coated and the sleeve is stainless steel for the prevention of corrosion and rust in order to ensure a smooth and contaminant free inner surface for proper and unhampered movement of the core. Annular Teflon bearings are utilized, as moisture will not cause the Teflon bearing to freeze in low temperature applications.
REFERENCES:
patent: 3510814 (1970-05-01), Nordfors
patent: 4131866 (1978-12-01), Torr
patent: 4233585 (1980-11-01), Sugimoto et al.
patent: 4518938 (1985-05-01), Bartholomaus et al.
Harris George
Jaeger Hugh D.
Minnesota Technical Research
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