Browse Prior Art Database

Card or Paper Tape Read Device

IP.com Disclosure Number: IPCOM000093344D
Original Publication Date: 1967-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Cole, JN: AUTHOR

Abstract

In this card or tape read unit, the element that produces an output signal is a transistor-like semiconductor. A station S where a card or tape is to be read comprises an upper tubular member 2 and a lower tubular member 4. Both members are made of a suitable insulating material. Associated with tube 2 is a transistor-like semiconductor whose emitter E is grounded, its collector C is connected to a source of voltage and its base B has tab 6 connected to it.

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Card or Paper Tape Read Device

In this card or tape read unit, the element that produces an output signal is a transistor-like semiconductor. A station S where a card or tape is to be read comprises an upper tubular member 2 and a lower tubular member 4. Both members are made of a suitable insulating material. Associated with tube 2 is a transistor-like semiconductor whose emitter E is grounded, its collector C is connected to a source of voltage and its base B has tab 6 connected to it.

The semiconductor produces an output signal at terminal 8 when a strain is applied to tab 6. Such a strain is produced on the tab when ever a hole in the card or tape appears at the station between members 2 and 4. The absence of a hole provides no output at terminal 8. The transistor-like semiconductor is available in the record playing field. The Euphonics Company markets a cartridge of the type that can be used with the read circuit. A frequency response that is DC to 20 kilocycles is obtained and a 1.0 volt output is realized.

The device has long life, good frequency response, a high output signal. No mechanical contact with either the card or tape being read is required.

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