Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1991-03-01
1993-04-13
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335258, H01F 708
Patent
active
052026582
ABSTRACT:
A solenoid device having an output which is substantially linearly proportional to its electrical input and which includes an axially adjustable polepiece. The polepiece carries a permanent magnet which is annularly disposed about the polepiece and which provides an efficient magnetic circuit in conjunction with the electromagnetic coil of the solenoid.
REFERENCES:
patent: 4403765 (1983-09-01), Fisher
patent: 4463332 (1984-07-01), Everett
patent: 4774485 (1988-09-01), Dietrich
patent: 4835503 (1989-05-01), Everett
patent: 4988074 (1991-01-01), Najmolnoda
Everett William F.
Heick Kevin C.
Hutchings Peter G.
Leinheiser Matthew E.
Hall James D.
Korka Trinidad
Picard Leo P.
South Bend Controls Inc.
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