Browse Prior Art Database

Sensing Holes and Marks

IP.com Disclosure Number: IPCOM000074467D
Original Publication Date: 1971-Apr-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Crovatto, G: AUTHOR

Abstract

This device is for sensing both holes and optical marks on record cards.

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Sensing Holes and Marks

This device is for sensing both holes and optical marks on record cards.

Light beam 1 from lamp 2 reaches card 3 through partially reflecting mirror 4. Holes 5 in card 3 are detected by photocell 6. Marks 7 on the card are detected by photocell 8 which collects the light reflected by the card surface and partially deviated by mirror 4.

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