Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1976-02-09
1978-06-27
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335266, 335268, H01F 708
Patent
active
040978338
ABSTRACT:
An electromagnetic device includes a stator having a first closed flux carrying path including a core and an air gap opening in the core. Flux is generated in the flux carrying path by a coil, with the direction of flux flow across the air gap being perpendicular to pole surfaces defining the air gap. An armature is mounted to be movable between the pole surfaces and to overlap varying areas of the pole surfaces in dependence upon the position of the armature. The overlap areas are directly proportional to the position of the armature. In one embodiment a bi-directional device having two such closed flux carrying path simultaneously acts on a single armature. The equilibrium position of the armature is dependent on the relative flux flow through the two flux carrying paths. A further embodiment is disclosed in which an air gap opening is inclined to the direction of flux flow in the core of the flux path. The area of each pole surface defining the inclined air gap exceeds the cross-sectional area of the core.
REFERENCES:
patent: 1878919 (1932-09-01), Van Dam et al.
patent: 2274775 (1942-03-01), Cox
patent: 2690529 (1954-09-01), Lindblad
patent: 2992304 (1961-07-01), Andrews
patent: 3070730 (1962-12-01), Gray et al.
patent: 3241006 (1966-03-01), Boyko
patent: 3503022 (1970-03-01), Burdett
Harris George
Ledex Inc.
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