Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1991-04-03
1992-11-10
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335281, H01H 708
Patent
active
051627671
ABSTRACT:
A high efficiency solenoid includes a magnetic material solenoid core, an electrical current conductive coil and a moveable magnetic plunger. The solenoid core has a first end portion, a first face disposed at the first end portion, a second end portion opposite the first end portion and a continuous channel disposed in the first face. The electrical current conductive coil disposed in the channel and arranged so that magnetic flux developed in response to a current in the coil forms a first magnetic pole on the first face interiorly of the channel and a second magnetic pole of opposite plurality on the first face exteriorly of the channel. The plunger has a surface and a facing coextensive relationship to the first face. The plunger is normally biased in a first position to space the surface from the first face to form a gap therebetween. There is no magnetic material which is received through a bore within the solenoid core. Therefore, the magnetic flux when present is bidirectional through the gap so that all magnetic flux exterior of the solenoid core develops a magnetic force substantial orthogonal to the surface to move the plunger to its second position, which is drawn towards the solenoid core reducing the gap.
REFERENCES:
patent: 1231271 (1917-06-01), Kratz
patent: 2057380 (1936-10-01), Keefe
patent: 3004195 (1961-10-01), Peras
patent: 4716393 (1987-12-01), Logie
Lee David
Sortore Christopher K.
Aura Systems, Inc.
Broome Harold
Cascio Anthony T.
Clifford Lisa A.
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