Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1987-03-30
1988-05-03
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360 97, G11B 554, G11B 2122
Patent
active
047424109
ABSTRACT:
An improved magnetic disk drive system including a rotatable disk, a shiftable carriage having a pair of read-write heads mounted by resilient arms thereon for coupled relationship with the disk, and a stepper motor for advancing and retracting the carriage and thereby the heads with respect to the disk. A locking mechanism is shiftably carried by a fixed base forming a part of the system, the mechanism including a locking member moveable between the resilient arms, whereby the arms are spread apart and the heads are moved away from the disk to prevent contact of the heads with the adjacent surfaces of the disk. The movement of the blocking member is a function of the movement of the carriage into its fully retracted position. Moreover, the member effectively locks the carriage against movement when the carriage is in the fully retracted position thereof. By shifting the member in the opposite direction, the carriage can then be driven toward the disk and into an operative position by the stepper motor, and the system can then operate in the normal fashion. The spindle motor for rotating the disk serves as a generator for generating a voltage to drive the stepper motor when a power-off condition occurs.
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Hall et al., "Head Retraction Latch Mechanism," IBM Tech. Disc. Bull., vol. 20, No. 6, Nov. 1977.
Hecker Stuart N.
Josephine County Technology, Inc.
Urcia Benjamin E.
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