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Browse Prior Art Database

Cam Disk Drive

IP.com Disclosure Number: IPCOM000046509D
Original Publication Date: 1983-Jul-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Kennedy, JS: AUTHOR

Abstract

A disk 11 may be rotated from its inside diameter (ID) by a pivoting cam 12 loaded by a spring 13. The drive locates on the ID of the disk at these points. Two of these points 11a are fixed and the third point is the apex of cam 12. The pivot of the cam is offset from the cam/ disk centerline by the amount necessary to obtain the desired friction angle.

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Cam Disk Drive

A disk 11 may be rotated from its inside diameter (ID) by a pivoting cam 12 loaded by a spring 13. The drive locates on the ID of the disk at these points. Two of these points 11a are fixed and the third point is the apex of cam 12. The pivot of the cam is offset from the cam/ disk centerline by the amount necessary to obtain the desired friction angle.

The torque capability of the drive is thus determined by the surface roughness of the cam and disk, the offset of the cam pivot, and the loading spring force.

The edge design of the cam may be varied to grip on either the actual disk ID or the ID chamber. The cam drive hub can be designed for plug-in and stacking capability

When the cam drive is adapted for grinding and polishing of disks, it would then be possible to lubricate and coat the entire disk surface. The existing spindle clamp on the present disk files prevents usage of the approximately 3/l6- inch-wide ring on each side of the disk. Utilization of an ID drive would permit the addition of a significant number of extra tracks per disk. If the cam drive were used, it would require two cams to prevent disk overrun; one cam would oppose the other.

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