Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1984-08-22
1987-06-09
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360135, G11B 5012
Patent
active
046724885
ABSTRACT:
To overcome problems of precise permanent location of aluminum Winchester discs relative to their steel drive spindle during temperature variations, in one form of the invention a plastic washer is placed between the disc and the underlying flange of the spindle. The washer maintains contact by static friction without slippage but is compliant with shear forces occasioned by temperature changes and, by reason of its elasticity, returns the members to their initial position when the original temperature is restored. In a second form of the invention, the steel flange is grooved to form a thin ring and the ring is slotted to provide flexible fingers on which the disc rests. These fingers likewise maintain permanent contact with the disc and are likewise compliant with changes in relative position occasioned by temperature variations, restoring the disc to original position relative to the spindle.
REFERENCES:
patent: 3587073 (1971-06-01), Ghose et al.
patent: 3723980 (1973-03-01), Gabor
patent: 4076393 (1978-02-01), Bates
patent: 4125883 (1978-11-01), Rolph
patent: 4176519 (1979-12-01), Kronogard
patent: 4205357 (1980-05-01), Barton et al.
Beck et al., "Hub Assembly for Flexible Disk Media" IBM Tech. Disc. Bull., vol. 19, No. 12 (May 1977).
Beck et al., "Flexible Disk Mounting Mechanism", IBM Tech. Disc. Bull., vol. 19, No. 6 (Nov. 1976).
Besha et al., "Disk Pack Compliance Clamp", IBM Tech. Disc. Bull., vol. 21, No. 2 (Jul. 1978).
Orlando, "Flexible Disk Structure", IBM Tech. Disc. Bull., vol. 19, No. 1 (Jun. 1976).
Hecker Stuart N.
Urcia Benjamin E.
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