Browse Prior Art Database

Serial Card Reader

IP.com Disclosure Number: IPCOM000092588D
Original Publication Date: 1966-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Betts, P: AUTHOR

Abstract

This is a punched card reader which senses the card column-by-column. Two sets 10 and 12, of twelve optical fibers each, are employed to read card 14 as it moves under light source 16 and condenser lens 18 in the direction shown. Motion to card 14 is imparted by motor 20 which also rotates slotted disk 22. Fibers 10 are arranged for card row sensing. Fibers 12 are all continuously illuminated by source 16. Fibers 10 and 12 are oriented horizontally at disk 22 so that they are sequentially scanned by the slots. Thus, fibers 12 emit clock pulses corresponding to the columns. When a hole is present in card 14, output impinges on detector 24 from both sets of fibers. The absence of a hole provides a half output. Each slot in disk 22 thus scans one column of card 14.

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Serial Card Reader

This is a punched card reader which senses the card column-by-column. Two sets 10 and 12, of twelve optical fibers each, are employed to read card 14 as it moves under light source 16 and condenser lens 18 in the direction shown. Motion to card 14 is imparted by motor 20 which also rotates slotted disk 22. Fibers 10 are arranged for card row sensing. Fibers 12 are all continuously illuminated by source 16. Fibers 10 and 12 are oriented horizontally at disk 22 so that they are sequentially scanned by the slots. Thus, fibers 12 emit clock pulses corresponding to the columns. When a hole is present in card 14, output impinges on detector 24 from both sets of fibers. The absence of a hole provides a half output. Each slot in disk 22 thus scans one column of card 14. Detent 26 is located on the shaft of disk 22 for proper registration.

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