Browse Prior Art Database

Process Control Device

IP.com Disclosure Number: IPCOM000093229D
Original Publication Date: 1967-Jul-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Rullgard, A: AUTHOR

Abstract

Computer 1 controls a process control system including a precision digital-to-analog converter 2, a number of reproducers 4 and a comparator 3, where the outputs front DAC 2 and one selected reproducer 4 are compared. Initially, DAC 2 is set from computer 1 and controls the process, at the same time as one reproducer 4 is selected for setting. When the outputs from DAC 2 and the selected reproducer 4 are equal, switches 5 and 6 are switched over and the process is controlled by the reproducer. Each reproducer includes a flip-flop K and a suitably dimensioned resistance R. Each flip-flop K cooperates with a pair of magnetic cores 7 and 8. All cores are included in a matrix. The windings are arranged such that each reproducer 4 is related to one line conductor.

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Process Control Device

Computer 1 controls a process control system including a precision digital- to-analog converter 2, a number of reproducers 4 and a comparator 3, where the outputs front DAC 2 and one selected reproducer 4 are compared. Initially, DAC 2 is set from computer 1 and controls the process, at the same time as one reproducer 4 is selected for setting. When the outputs from DAC 2 and the selected reproducer 4 are equal, switches 5 and 6 are switched over and the process is controlled by the reproducer. Each reproducer includes a flip-flop K and a suitably dimensioned resistance R. Each flip-flop K cooperates with a pair of magnetic cores 7 and 8. All cores are included in a matrix. The windings are arranged such that each reproducer 4 is related to one line conductor. The column conductors are divided in two groups cooperating with each one-step selector M. Signals from computer 1 to the selected line conductor and signals from comparator 3 to the column conductors via selectors M then set the reproducer stepwise to generate the desired output.

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