Browse Prior Art Database

Accumulating Counter Feature Modification

IP.com Disclosure Number: IPCOM000084685D
Original Publication Date: 1975-Dec-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Loeber, NC: AUTHOR

Abstract

This simple modification to commercially available magnetic card and magnetic store typewriters, enables ready accumulation of pertinent data and typewriter printout for the enhancement of learning processes and grading systems, especially where the data compare feature is already available.

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Accumulating Counter Feature Modification

This simple modification to commercially available magnetic card and magnetic store typewriters, enables ready accumulation of pertinent data and typewriter printout for the enhancement of learning processes and grading systems, especially where the data compare feature is already available.

Conventional magnetic card and magnetic store typewriters have one or more card readers 10 and a magnetic data store 12, with a readout section, capable of storing the entire contents of two or more magnetic cards among other features of these versatile typewriters.

A compare register 20 of conventional form is coupled by suitable circuitry such as AND gating circuits 22,24 to the card reader 10 and store readout section 12, respectively. Clocking pulses are shown as emanating from a generator 26. A compare command level is applied at a terminal 28. Circuitry is interposed in the control circuitry of the typewriter in a straightforward fashion, to alter the mode of operation and add the logic circuits necessary to carry out the operations desired.

A counter or accumulator 32, present in some of the conventional machines, or added as necessary, is connected through an AND gating circuit 34 to the clock pulse generator 26 for enabling the accumulation of a desired count. One such count is furnished by the depression of a predetermined key (backspace key for example) of the typewriter keyboard, which is inputted at a terminal 36 of an OR gating circuit 38, for example. A machine function signal (carriage return- line feed, for example) is inputted at terminal...