Magnetic shield for rotary actuator in a magnetic disc device

Details Magnetic shield for rotary actuator in a magnetic disc device Magnetic shield for rotary actuator in a magnetic disc device

1983-10-13

1987-04-14

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 5012

Patent

active

046583130

ABSTRACT:
A rotary actuator for a magnetic disc device for swinging a head arm to position a magnetic head mounted at an end of the head arm to a desired track of a magnetic disc is disclosed. Magnetic shield plates are provided to a magnetic circuit assembly which forms a voice coil motor together with a moving coil mounted at a rear end of a head carriage which supports the head arm in order to prevent leakage magnetic fluxes created in the vicinity of a permanent magnet of the magnetic circuit assembly from reaching the magnetic head.

REFERENCES:
patent: 4300176 (1981-11-01), Gilovich
patent: 4331991 (1982-05-01), Morehouse
patent: 4346416 (1982-08-01), Riggle
patent: 4544972 (1985-10-01), Kogure

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