Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1980-08-04
1982-11-16
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 78, G11B 5016, G11B 554, G11B 2108
Patent
active
043597637
ABSTRACT:
An improved floppy disc drive, with direct disc rotational drive, characterized by a step motor having a plurality of pole pairs with pole pieces fabricated from a portion of the drive housing at predetermined locations, and a disc having radial webs and positioned so that pairs of such radial webs align one pair at a time with successive ones of successively energized pole pairs, thereby providing a highly efficient and compact disc drive motor. The drive assembly also contains a read head drive with a step motor and transmission means for driving the read head radially with respect to the floppy disc. Means are provided which enable clutch operation to engage the disc with the drive only when the disc is properly seated within the drive assembly.
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Eddleman Alfred H.
Exxon Research and Engineering Co.
Schaefer Kenneth R.
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