Browse Prior Art Database

Beam Addressable File with Flexible Disks

IP.com Disclosure Number: IPCOM000080846D
Original Publication Date: 1974-Feb-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

May, GH: AUTHOR

Abstract

This arrangement provides high-density data storage and rapid accessibility, while using conventional electromagnetic transducers for recording and reproducing data.

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Beam Addressable File with Flexible Disks

This arrangement provides high-density data storage and rapid accessibility, while using conventional electromagnetic transducers for recording and reproducing data.

A pair of flexible disks 10 and 12 are clamped together on a spindle adapted for rotation by a shaft 16. Both disks 10 and 12 are transparent at least in the spectrum of a suitable laser, and have magnetic oxide coatings in contact with each other. The disks are urged into intimate contact at one area near the periphery of the disks by a shoe 18 of transparent material. An edge 20 of the shoe 18 accurately locates the oxide surfaces in this area.

At the opposite side of the disk, an accessing arm 22 having a tapered section terminated by a ball 24 is arranged to part the disks during movement, whereby an electromagnetic transducer 26 in the accessing arm 22 is brought into recording and reproducing relationship with the oxide coatings of the disk 10.

The disk 10 is a transfer disk and the disk 12 is a storage disk. Data is entered onto the transfer disk 10 by driving the electromagnetic transducer 26. The data as recorded will be of conventional track width. A narrow central track of this data is transferred from the disk 10 to the disk 12 by heating the magnetic oxide coatings to the Curie point, in a thermomagnetic known transfer process. For this purpose, an access arm 30 is set to a predetermined track for the transfer operation.

The access arm 30 compris...