Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1983-07-28
1986-10-28
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360106, 360 77, 360 98, 318135, 310 12, 310 13, G11B 555, G11B 2108, G11B 552, G11B 2104
Patent
active
046202536
ABSTRACT:
An actuator for a magnetic read/write head carried by a linear motor has its stator located between a pair of disks within a stack of magnetic recording disks. The stator comprises an array of reversed polarity magnets (preferably permanent) in a linear array. A pair of flat coils are the drive elements of the armature of the motor with the coils arranged in side-by-side relationship for bridging from magnet to magnet in the stator. Thus the armature will not be stalled between magnets. The actuator is controlled by an electronic control system for selecting any position precisely, rather than in steps as in a stepping motor. A microprocessor can be used to adjust control of the direction of motion of the actuator based upon feedback signals.
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IBM Technical Disclosure Bulletin, vol. 21, No. 11, Apr. 1979, pp. 4632-4633 "Small Modular/Linear Voice Coil Actuator", by Johnson, Jr. et al.
Garwin Richard L.
Thompson David A.
Garcia Alfonso
International Business Machines - Corporation
Jones II Graham S.
Tognino Alexander
Wolff John H.
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