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Optical Code Generator

IP.com Disclosure Number: IPCOM000097647D
Original Publication Date: 1961-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Scalone, JM: AUTHOR

Abstract

The arrangement of light sources and photosensitive devices generates a code which corresponds to the value assigned to the various row positions in a punched card. Each of the small shaded rectangles denotes a light source photodetector combination which is arranged to be successively intercepted by the leading edge of a card moving in the direction shown.

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Optical Code Generator

The arrangement of light sources and photosensitive devices generates a code which corresponds to the value assigned to the various row positions in a punched card.

Each of the small shaded rectangles denotes a light source photodetector combination which is arranged to be successively intercepted by the leading edge of a card moving in the direction shown.

The pattern is such that as the leading edge of the card advances to the successive reading positions shown at the top of the diagram, the combinations of photosensitive devices provide output signals in a coded combination indicated by the values at the right.

For example, when the card is at the position where all punched holes in the 12 row are sensed, the A, B and C detectors in column 12 are covered by the leading edge of the card. A corresponding combination of output pulses is generated. The C bit is employed to provide an odd bit for checking purposes.

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