Browse Prior Art Database

Program Ring for Disk Storage Devices

IP.com Disclosure Number: IPCOM000094740D
Original Publication Date: 1965-May-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Harmon, JJ: AUTHOR

Abstract

The apparatus alters the sector length of standard disk packs.

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Program Ring for Disk Storage Devices

The apparatus alters the sector length of standard disk packs.

For example, one disk 11 is divided into 20 sectors by twenty slots 10 cut into the disk periphery. These are sensed by a light beam and photocell or by magnetically sensing slots 10.

To alter the sector lengths, slugs 12, shaped to correspond to slots 10, are selectively placed in the desired ones of slots 10. Flexible retaining ring 13 is then placed around the periphery of disk 11 to hold slugs 12 in position. Thus, slugs 12 prevent the passage of the light beam through the selected ones of slots
10.

Alternatively, slugs 12 can be permanent magnets which are sensed by a magnetic transducer. Therefore, each slug represents a sector mark, the position of which can be varied by selected placement of slugs 12.

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