Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1977-08-18
1979-05-08
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335262, H01F 708
Patent
active
041538900
ABSTRACT:
Wet and dry plunger solenoids are formed with a three-piece spool assembly including a base and a hub joined by a non-magnetic sleeve. An electric coil is wound directly onto the sleeve to compress the sleeve about the telescopically interfitted base and hub parts to form a fluid-tight joint. In a wet plunger solenoid the armature or plunger cavity has high resistance to deformation when fluid pressure is applied to the interior, and a fluid-tight joint is formed which is free of threaded connections and is reinforced by reason of the fact that the coil is wound in tension. The cumulative compression effectively joins the parts into a unitary structure. Also, a highly efficient low cost construction is provided for use in a dry solenoid.
REFERENCES:
patent: 3921111 (1975-11-01), Kowalski
patent: 4004343 (1977-01-01), Marsden
Harris George
Ledex Inc.
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