Browse Prior Art Database

Card Reader

IP.com Disclosure Number: IPCOM000096430D
Original Publication Date: 1963-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Seesing, GH: AUTHOR

Abstract

Data is entered on record cards in two ways, either by perforated index points or by marked indexpoints. This device reads either perforations or marks from the same card.

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Card Reader

Data is entered on record cards in two ways, either by perforated index points or by marked indexpoints. This device reads either perforations or marks from the same card.

A scanning unit, iconoscope 10, is mounted above a card path. Lamp 11 is mounted at one side and casts rays through lens 12. This concentrates the light on the surface of card 14 at such an angle that the light is reflected upward to iconoscope 10. Lamp 15 is mounted in reflector 16 below the card path and casts rays through perforations 17 on the card.

This results in three gradients of light, white through the perforations, grey or intermediate reflected from the card stock, and no light or black reflected from marks 18. Iconoscope 10 is accordingly, as indicated, subjected to a minimum or black level response for sensed mark data or to a maximum in light level responses for sensed holes. These extreme levels are interpreted as data by sensing circuitry linked to 10.

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