Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Binary Record Photosensing Apparatus

IP.com Disclosure Number: IPCOM000095439D
Original Publication Date: 1964-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Patterson, JL: AUTHOR

Abstract

This photosensing arrangement has two photoresponsive devices 1 and 2 which, in turn, act to control a flip flop circuit 3. Devices 1 and 2 are arranged in the circuit and in the light path in such a fashion that their effects aid each other. A faster response is obtained in a photoconductor when it changes to the off condition.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Binary Record Photosensing Apparatus

This photosensing arrangement has two photoresponsive devices 1 and 2 which, in turn, act to control a flip flop circuit 3. Devices 1 and 2 are arranged in the circuit and in the light path in such a fashion that their effects aid each other. A faster response is obtained in a photoconductor when it changes to the off condition.

The following results are realized.

1) Photoconductors 1 and 2 receive transmitted light when

there is no card or when light passes through successive

perforations.

2) One photoconductor receives reflected light when there is

no aperture, the other receiving transmitted light when

there is an aperture.

3) Photoconductors 4 and 5 receive reflected light from

successive portions when there is no perforation.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]