Browse Prior Art Database

Multiple Sensing of Punched Cards

IP.com Disclosure Number: IPCOM000096970D
Original Publication Date: 1962-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Hauslein, G: AUTHOR

Abstract

The punched card 1 to be sensed is clamped on a metallic cylinder 2. Above the metallic cylinder 2 there are fixedly mounted eighty (for line by line scanning) or twelve (for column by column scanning) sensing stations, the essential feature of which is a contact spring 4.

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Multiple Sensing of Punched Cards

The punched card 1 to be sensed is clamped on a metallic cylinder 2. Above the metallic cylinder 2 there are fixedly mounted eighty (for line by line scanning) or twelve (for column by column scanning) sensing stations, the essential feature of which is a contact spring 4.

Below each index position of the punched card, cylinder 2 contains a bore 5 in which a contact pin 6 is slidably mounted. If now the cylinder 2 with the punched card 1 is rotated at high speed, the contact pins 6 are, due to the centrifugal force, pressed outwardly against the punched card.

In the presence of a hole, a contact pin 6 penetrates the punched card 1. This is to such an extent that in passing the sensing station it touches the corresponding contact spring 4. Thus, a conductive connection between the metallic cylinder 2 and the contact spring 4 is established. The circuit is closed through a wiper brush 7.

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