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Emitter for Perforate Badge Reader

IP.com Disclosure Number: IPCOM000081510D
Original Publication Date: 1974-Jun-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Brinson, PR: AUTHOR [+2]

Abstract

The emitter includes a perforate emitter strip 7 passing between a light-emitting diode 10 and a phototransistor 11 located directly below diode 10. Strip 7 is moveable with a perforate badge 5 as the badge 5 is moved into the reader 14, obviating the necessity for an emitter wheel rotatable with movement of badge 5 into reader 14.

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Emitter for Perforate Badge Reader

The emitter includes a perforate emitter strip 7 passing between a light- emitting diode 10 and a phototransistor 11 located directly below diode 10. Strip 7 is moveable with a perforate badge 5 as the badge 5 is moved into the reader 14, obviating the necessity for an emitter wheel rotatable with movement of badge 5 into reader 14.

When badge 5 is inserted into reader 14, it moves sliding bar 4 away from stationary light-emitting diode package 1 and phototransistor package 2. Data carrying openings 12 in badge 5 register with light-emitting diodes 10a in package 1, each located directly above a corresponding phototransistor in package 2 for reading the openings 12 with his movement of badge 5.

A reading of the first opening 12 in badge 5 by one of the latter phototransistors is assured by making dimension 8 equal to dimension 9, so that diode 10 energizes phototransistor 11 at the same time that the first opening 12 is in registry with one of the diodes 10a. The distance between perforations 7a in strip 7 is the same as the distance between columns of the openings 12 extending transversely of badge 5, so that each of the succeeding openings 12 is read at the same time as an opening 7a is in registry with diode 10 and transistor
11. The signal from the phototransistor 11 in each case causes a scanning of the badge 5 for this reading function.

Emitter strip 7 as well as dummy strip 3 are held in tension by springs 6, and springs...