Actuator for disk drive

Details Actuator for disk drive Actuator for disk drive

1989-09-19

1991-08-20

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360105, G11B 555

Patent

active

050419340

ABSTRACT:
An actuator for positioning a head with respect to a disk rotatably supported by a base plate in a disk drive assembly, including an actuator arm mounted on the base plate for supporting the head, and an electromagnetic assembly including the base plate for positioning the head with respect to the disk. The electromagnetic assembly includes a first magnet for providing a first magnetic field, the actuator arm includes a coil for passing an electric current in the magnetic field, and the base plate functions as a portion of a return for the magnetic field. A top plate mounted on the base plate supports a second magnet, which provides a second magnetic field, and the coil has portions in the first and second magnetic fields. A center pole extending through the coil, supports for holding the center pole between the top and base plates, and the top and base plates function as returns for the first and second magnetic fields.

REFERENCES:
patent: 4300176 (1981-11-01), Gilovich
patent: 4414594 (1983-11-01), Farmer
patent: 4427905 (1984-01-01), Sutton
patent: 4716483 (1987-12-01), Walsh

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