Browse Prior Art Database

Asynchronous Optical Mark Reader Punch System

IP.com Disclosure Number: IPCOM000095900D
Original Publication Date: 1964-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Bene, JF: AUTHOR [+3]

Abstract

In the Optical Mark Reader, Punch and Printer System 10, data represented by marks 15 optically read from documents 20 can be transferred to punch buffer storage 100 via delay line 30 or entered from counter 50 after having been processed. Data in buffer 100 is transferred asynchronously to punch unit 150 which provides control signals for gating data from buffer 100.

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Asynchronous Optical Mark Reader Punch System

In the Optical Mark Reader, Punch and Printer System 10, data represented by marks 15 optically read from documents 20 can be transferred to punch buffer storage 100 via delay line 30 or entered from counter 50 after having been processed. Data in buffer 100 is transferred asynchronously to punch unit 150 which provides control signals for gating data from buffer 100.

Identification data is one type entered directly into buffer 100 while response and score data enters in it via counter 50. Punch unit 150 not only signals buffer 100 to send data but it also signals transport control 40 to effect the feeding of another document 20.

This arrangement permits data to be entered into buffer 100 at a speed determined by the apparatus for reading documents 20 and entering the data read from it onto delay line 30 under timing control 60. Data is read from buffer 100 at a speed determined by punch unit 150.

The function and operation of the compare logic, response latches, RWO select switches, question length switches, part selection, data control by part, and counter readout control is described in detail in the IBM Customer Engineering Manual of Instruction for the 1230 Optical Mark Scoring Reader, Form No. 231-0018-1, obtainable from IBM Branch Offices.

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