Browse Prior Art Database

Disk Interface Location

IP.com Disclosure Number: IPCOM000085871D
Original Publication Date: 1976-Jun-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 90K

Publishing Venue

IBM

Related People

McGinnis, BW: AUTHOR

Abstract

Multiple (e.g., in excess of 500) floppy-type magnetic storage disks 1 (Fig. 1), separated by shorter diameter spacers 2, and have recording surfaces 3 are laterally displaceable within limits defined by end plates 4,5. The disks, spacers and plates rotate continuously and the disks 1 serve as a large capacity random-access file unit.

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Disk Interface Location

Multiple (e.g., in excess of 500) floppy-type magnetic storage disks 1 (Fig.
1), separated by shorter diameter spacers 2, and have recording surfaces 3 are laterally displaceable within limits defined by end plates 4,5. The disks, spacers and plates rotate continuously and the disks 1 serve as a large capacity random- access file unit.

A variably positioned gap (split) 6.1 (Fig. 2) radially accommodates the transportable storage transducing head 8. This gap extends over the full 360 degree circuit of the unit and is established and sustained at a selected interface, by critically controlling the pressure of air supplied through openings 9, 9.1 to the spaces between surfaces 3. The method and equipment for establishing this type of gap is described in U.S. patent No. 3,936,880.

It is also recognized at present that the disturbance required for initiating formation of an "access" gap 6.1 can be produced by an external air nozzle of the form described in the IBM Technical Disclosure Bulletins, Vol. 17, No. 1, June 1974, pages 329, 330 and Vol. 17, No. 11, April 1975, pages 3351, 3352.

It is also known at present that if the nozzle 10 (Fig. 3) is energized while the internal pressure is above the critical threshold for establishing and sustaining a gap 6.1, the partial gap 6.2 due to the nozzle pressure can be used to facilitate location of the interface to be selected for access. Although partial gap 6.2 is not suitable for receiving the head 8, it...