Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1991-05-15
1993-07-27
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360105, G11B 555, G11B 2108
Patent
active
052315576
ABSTRACT:
A magnetic disk apparatus includes a magnetic head, a magnetic disk, and a rotary actuator to move the magnetic head onto the magnetic disk. The rotary actuator includes a center shaft fixed to a disk enclosure, a carriage supporting the magnetic head and rotatably mounted to the center shaft, and a coil spring to return the carriage to a CSS zone when there is a breakdown or failure of the power supply of the magnetic disk apparatus. The coil spring is provided in a space formed between the center shaft and the carriage, and thereby can achieve a more compact magnet disk apparatus. Moreover, due to the assembly of the return coil spring around the shaft using a pair of end ring members, contact of the spring with the shaft and carriage is avoided and proper operation of the magnetic heads is ensured.
REFERENCES:
patent: 4888056 (1989-12-01), West
patent: 5018035 (1991-05-01), Johnson
patent: 5060100 (1991-10-01), Mihara et al.
patent: 5109310 (1992-04-01), Ohkjita et al.
patent: 5119254 (1992-06-01), Brown et al.
Matsumoto Hisashi
Ogawa Yoshinori
Fujitsu Limited
Wolff John H.
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