Linear actuator for moving a recording/reading head in an access

Details Linear actuator for moving a recording/reading head in an access Linear actuator for moving a recording/reading head in an access

1986-02-24

1988-05-17

Hecker, Stuart N.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

310 13, G11B 555, G11B 2108

Patent

active

047455039

ABSTRACT:
A linear actuator has a flat box-like carriage movable along an access direction of a disk as a recording medium, a motor coil housed and fixed in the carriage, and a permanent magnet arrangement housed and fixed in the carriage to apply a magnetic field to the motor coil. The permanent magnet arrangement includes an E-shaped yoke member with a central portion extending along the access direction and inserted in the motor coil, a pair of outer portions arranged along two sides of the central portion, and permanent magnets arranged on opposite surfaces of the outer and central portions. The yoke member is arranged in the carriage to be parallel to the disk.

REFERENCES:
patent: 3587075 (1971-06-01), Brown et al.
patent: 4072101 (1978-02-01), Garcia et al.
patent: 4220899 (1980-09-01), Von Per Heide
patent: 4305105 (1981-12-01), Ho et al.
patent: 4393425 (1983-07-01), Wright
patent: 4408138 (1983-10-01), Okamoto
patent: 4415941 (1983-11-01), Gibeau et al.
patent: 4427905 (1984-01-01), Sutton
patent: 4613962 (1986-09-01), Inoue et al.
patent: 4631431 (1986-12-01), Viskochil
Guzman et al., "Voice Coil Motor," IBM Tech. Disc. Bull., vol. 20, No. 5, Oct. 1977.

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