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Perforated Tape Reader

IP.com Disclosure Number: IPCOM000097837D
Original Publication Date: 1961-Aug-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Battison, AH: AUTHOR [+4]

Abstract

A section of punched paper tape 1 is positioned around a normally stationary drum 2. Inside the drum are a number of light guides 3. These are square cross-section tubes of which there is one for each hole position in the tape around the drum. There are shown twenty four sets of guides around the drum. Each of these sets may have five or eight guides across the drum according to the coding used in the tape.

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Perforated Tape Reader

A section of punched paper tape 1 is positioned around a normally stationary drum 2. Inside the drum are a number of light guides 3. These are square cross- section tubes of which there is one for each hole position in the tape around the drum. There are shown twenty four sets of guides around the drum. Each of these sets may have five or eight guides across the drum according to the coding used in the tape.

A cylinder 4 is positioned in a bore at the center of the drum and is rotated while the drum is stationary. The cylinder carries a set of photocells 5, one photocell for each longitudinal line of perforations on the tape. Light radiating from source 6 passes through the perforations on the tape, through the associated light guides and is picked up by the photocells as the cylinder rotates. A series of coded output pulses, corresponding to data read from the tape, is obtained from the photocells.

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