Multiple coils for reduction of stray magnetic fields in disk fi

Details Multiple coils for reduction of stray magnetic fields in disk fi Multiple coils for reduction of stray magnetic fields in disk fi

1985-04-02

1987-05-26

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

310 13, G11B 2108, H02K 4100

Patent

active

046690131

ABSTRACT:
A linear disk actuator is disclosed incorporating a magnetic circuit for reducing stray magnetic fields in the region of the disks and recording heads of a magnetic recording disk system. The moving part of the actuator is provided with a plurality of coils mounted thereon, at least two of which are energized simultaneously and in magnetically opposing relationship to reduce the amplitude of the stray magnetic fields. Movement of the actuator is achieved by both energized coils interacting with a set of alternating poles positioned on the stationary part of the actuator.

REFERENCES:
patent: 3599020 (1971-08-01), Harris et al.
patent: 4314295 (1982-02-01), Frandsen

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