Browse Prior Art Database

Plunger Card Reader

IP.com Disclosure Number: IPCOM000096371D
Original Publication Date: 1963-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Duneau, J: AUTHOR [+2]

Abstract

The device uses a magnetic plunger to couple two coils together.

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Plunger Card Reader

The device uses a magnetic plunger to couple two coils together.

Card 5 is advanced to the read station. Coil 1 is fed by a signal the frequency of which is f. When there is a hole in the card, the magnetic plunger 3 penetrates into the second coil 2 and so couples coil with coil 1. This allows by induction the occurrence of signal the output 4 of coil 2.

A third coil 7 is used for resetting plunger 3 and maintaining it in the rest position 6.

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