Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1983-03-10
1985-06-25
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335274, 335279, H01F 708
Patent
active
045256969
ABSTRACT:
A driver for rotating a magnetic head affixed thereto having a housing, an armature rotably mounted within the housing, at least two field magnets within the housing and positioned around the axis of rotation for the armature, a driving coil and a concentrator for concentrating the magnetic flux from the field magnets so as to return the armature to a home position when no current is applied to the driving coil. The driver is affixed in the housing concentric with at least a portion of the armature such that a current passing through the driving coil develops a magnetic field polarizing the armature and causing a peripherential attraction of the armature toward an adjacent one of the field magnets and a corresponding repulsion of the armature from an adjacent other of the field magnets, thereby tending to rotate the armature a direction and distance proportional to the magnitude and polarity of the current.
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Patent Abstracts of Japan, vol. 2, No. 124, Oct. 18, 1978, p. 7291E78.
Bauer William D.
Harris George
Minnesota & Mining Manufacturing Company
Sell Donald M.
Smith James A.
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