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US 4,091,454 AGranted
Self-centering disk having an eccentric elliptical-shaped center locating hole
AssigneeInternational Business Machines Corporation
InventorElwood Ludwig Kauffmann
Life of this patent
Estimating the term…
Abstract
A magnetic disk member for a memory disk file usable in a data processing system includes an eccentric multi-lobed triangular center locating hole to facilitate concentric mounting of the locating hole centerlines in a multiple disk pack memory. The disks are centered in a disk pack by placing onto a drive hub having ribs to match the lobes of the locating holes.
Claims20
A disk record member for self-centering around a drive hub in an assembly comprising:
- a flat substrate essentially circularly shaped;
- a multilobed center locating drive hole in said substrate;
- formed from eccentric arcuate bearing surfaces;
- and
- means for storing information on said substrate.
2 more elements
A disk file for processing signals by transducing operation between a transducer and a rotating disk comprising:
- at least one disk each having a multilobed center locating hole including angularly spaced eccentric arcuate bearing surfaces and with each disk having information stored thereon in the form of impulses;
- a transducer means for sensing the impulses from said disks;
- a rotary drive hub assembly having a number of protrusions equal in number to the lobes of said disk for engaging said arcuate bearing surfaces of said center locating hole of each disk to drive said disks;
- drive means connected to said hub assembly for rotating said hub assembly and said disks;
- and
- means for loading said disks into intimate contact with said transducer means.
3 more elements
A disk file comprising:
- at least one disk each having a multilobed, center locating hole formed from angularly spaced eccentric arcuate bearing surfaces and with each disk having information stored thereon in the form of impulses;
- and
- a rotary drive hub assembly having a number of protrusions equal in number to the lobes of said disk for engaging said arcuate bearing surfaces of said center locating hole of each disk to drive said disks.
Dependencies are inferred from the claim text.