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Diode Card Read Only Memory

IP.com Disclosure Number: IPCOM000096881D
Original Publication Date: 1962-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Webb, EJ: AUTHOR

Abstract

The memory is formed by inserting a perforated record card between two plates of insulating material. One carries rows of diodes. The other carries rows of spring contacts adapted to make contact with the diodes through perforations in the record card. The rows of diodes and contacts extend at right angles to each other.

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Diode Card Read Only Memory

The memory is formed by inserting a perforated record card between two plates of insulating material. One carries rows of diodes. The other carries rows of spring contacts adapted to make contact with the diodes through perforations in the record card. The rows of diodes and contacts extend at right angles to each other.

Card 10 is inserted between plate 11 containing rows of diodes 12 and plate 14 carrying rows of contacts 15. Contacts 15 are formed of spring material 16 and pass through a perforation in the record card into contact with a diode. In reading, a switch 17, sweeps contacts 18 common to each diode row. It sequentially completes a circuit from battery through an individual signal winding
20. These are in series with each row of contacts 15 in which contact is made with one of the diodes in the row on which switch 17 is resting. The diodes prevent backcircuits from affecting the signals.

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