Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1984-11-07
1987-03-17
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335262, 335266, H01F 708
Patent
active
046511180
ABSTRACT:
A solenoid having a high degree of proportionality. A stationary pole is disposed within an electromagnetic coil and forms part of a flux path. An armature slides into and out of a bore of the pole and forms another part of the flux path. The armature has walls which define an axial recess formed in the armature face adjacent the pole. The armature walls have a cross-sectional thickness which decreases in a direction toward the bore. The walls of the pole bore have a cross-sectional thickness which decreases in a direction toward the armature. An air gap is formed between the decreasing thickness pole bore walls and armature walls which air gap remains substantially constant in the radial dimension as the armature slides.
REFERENCES:
patent: 3735302 (1973-05-01), Eckert
patent: 3970981 (1976-07-01), Coors
patent: 4525695 (1985-06-01), Sheng et al.
patent: 4528534 (1985-07-01), Read
Zeuner Kenneth W.
Zeuner Steven K.
Zeuner Thomas A.
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