Moving magnet actuator

Details Moving magnet actuator Moving magnet actuator

1987-04-24

1988-10-04

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 555, G11B 2110

Patent

active

047759089

ABSTRACT:
A moving magnet rotary actuator is provided for use in a memory device of the type having a magnetic memory disk upon which data may be stored and read. The actuator includes a rotary body coupled to one or more elongated arms which support read/write transducer heads. A permanent magnet, driven by the magnetomotive forces which are generated by the energization of a stationary coil mounted opposite and adjacent to the magnet, is mounted on and moves with the body. Rotation of the body moves the heads from track to track on the magnetic memory disk. The direction of movement is determined by the polarity of the current through the coil; and the speed and distance of actuator travel is determined by the magnitude of the current.

REFERENCES:
patent: Re32075 (1986-01-01), Harrison et al.
patent: 4064545 (1977-12-01), Goss
patent: 4131921 (1978-12-01), Gruczelak
patent: 4196456 (1980-04-01), Manzke et al.
patent: 4300176 (1981-11-01), Gilovich et al.
patent: 4331991 (1982-05-01), Morehouse et al.
patent: 4490635 (1984-12-01), Harrison et al.
patent: 4544972 (1985-10-01), Kogure et al.

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