Browse Prior Art Database

Superconductive Tape Memory

IP.com Disclosure Number: IPCOM000098494D
Original Publication Date: 1960-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Anderson, JL: AUTHOR

Abstract

A perforated tape of superconductive material is employed as a memory device at superconductive temperatures.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Superconductive Tape Memory

A perforated tape of superconductive material is employed as a memory device at superconductive temperatures.

Each row of perforations serves to divide the tape into a number of parallel current paths. Associated magnetic write heads, one for each path, are effective to direct a current through a selected path or paths at each row. Each write head is effective when energized to render the associated path nonsuperconducting.

A current is fed longitudinally along the tape by means of slip rings attached to the winding reels. To record information, all the write heads, except one, are energized driving the associated paths resistive and steering the current into a single superconducting path. Next, the heads associated with the paths corresponding to the desired code or routing are de-energized and the previously de-energized head energized. This causes the current to now through the selected superconducting paths. Upon de-energization of all the write heads, the current continues to flow through the established superconducting paths even though the non-selected paths are again superconducting.

Information readout is accomplished by a pickup coil scanning transverse to the tape as shown or, alternatively, by a set of cryotron gates arranged to be operated by current flow through the selected paths.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]