Browse Prior Art Database

Streaming Processor With Positioned Flexible Magnetic Surfaces

IP.com Disclosure Number: IPCOM000094993D
Original Publication Date: 1965-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Dirks, GH: AUTHOR

Abstract

The system in drawing 1 comprises a plurality of tape storage units 10... 13. There is a corresponding plurality of synchronously rotating sensing and recording heads 20...23 scanning selected tracks of essentially stationary tapes. Corresponding track selection devices 30...33 are for selecting tape tracks. Cyclic storage unit 40 incorporates a flexible magnetic disk 60 and fixed heads 62. An optical syncing system including optical disk 72 and optical head 74 controls motor 76 through the computer.

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Streaming Processor With Positioned Flexible Magnetic Surfaces

The system in drawing 1 comprises a plurality of tape storage units 10... 13. There is a corresponding plurality of synchronously rotating sensing and recording heads 20...23 scanning selected tracks of essentially stationary tapes. Corresponding track selection devices 30...33 are for selecting tape tracks. Cyclic storage unit 40 incorporates a flexible magnetic disk 60 and fixed heads
62. An optical syncing system including optical disk 72 and optical head 74 controls motor 76 through the computer.

In the tape unit, one of which is shown in drawing 2, head 20 is drum- mounted and protrudes. Its plane of rotation is at an angle to the edge of tape
42. The latter is partially wrapped about drum 44. Assuming one hundred tracks to the inch and that one track is equivalent to a disk track, this amount of information can be accessed within one inch of tape travel. There are marks, e.
g., apertures along one edge of each tape at one inch intervals, to locate a particular group of one hundred tracks. These apertures are counted via apertures 46 and 48 on accessor strip 52 as the tape is advanced. Presensing via aperture 48 allows the tape to be slowed when the desired address approaches.

A specific track is located with respect to the related reference aperture 46 by control of accessor 52 by stepping motor 50. This is set to the desired track position while the apertures are being counted. When the tape is...