Head positioner preloaded stop

Details Head positioner preloaded stop Head positioner preloaded stop

1987-10-09

1989-01-03

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 555

Patent

active

047961317

ABSTRACT:
A Winchester or hard disk drive, with a head positioner rotor is provided with a bidirectional preloaded stop. The head positioner rotor is provided with a plate having two spaced stop surfaces, both of which engage a single stop, which may be in the form of a U-shaped spring, which is partially compressed, and which has two pivoted, high strength plastic members against which the stop surfaces of the head positioner rotor impinge. The plate may also be provided with a notch into which the armature of an electromagnet fits so that the head positioner rotor is locked in the position with the heads adjacent the drive spindle, when the drive is turned off. When the rotor is energized, and the disks get up to speed, the electromagnetic is energized, and the head positioner rotor is freed to move to a selected track for reading or writing digital information.

REFERENCES:
patent: 4110802 (1978-08-01), Ho et al.
patent: 4131921 (1978-12-01), Gruczelak
patent: 4346416 (1982-08-01), Riggle et al.
patent: 4635151 (1987-01-01), Hazebrouck
patent: 4706142 (1987-11-01), Hattori et al.
Pertec, Mini Wini, May 1980.

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