Weighing scale system for a conveyor with footage counter for improved calibration

Abstract

Abstract AN INTEGRATING SYSTEM FOR INDICATING THE TOTAL WEIGHT OF MATERIAL THAT HAS BEEN MOVED BY AN ENDLESS BELT-CONVEYOR OVER A WEIGHING SCALE. THE SYSTEM MUST PERIODICALLY BE RE-CALIBRATED FOR "ZERO" AND "SPAN" DUE TO A NUMBER OF VARIABLES SUCH AS NONUNIFORMITY OF THE BELT, MATERIAL STICKING TO THE BELT, ETC. A PREDETERMINING FOOTAGE COUNTER IS MANUALLY PRESET TO THE TOTAL NUMBER OF FEET REQUIRED FOR THE CALIBRATION RUN. THIS COUNTER COUNTS DOWNWARDS AND WHEN IT COUNTS OUT, IT STOPS THE OUTPUT TO THE WEIGHT TOTALIZER. THE SYSTEM IS FIRST RUN FOR A ZERO CALIBRATION AND IF THE READING IS OFF, THE ZERO ADJUSTING DEVICE IS TURNED IN THE PROPER DIRECTION UNTIL THE READING IS CLOSE ENOUGH ON A RERUN. THE SYSTEM IS THEN RUN FOR A SPAN CALIBRATION AND IF THE READING IS OFF, THE NON-INTERACTING SPAN ADJUSTING DEVICE IS TURNED IN THE PROPER DIRECTION UNTIL THE READING IS CLOSE ENOUGH ON A RE-RUN. IN EACH CASE, THE FOOTAGE COUNTER PRECISELY CONTROLS THE AMOUNT OF CONVEYOR FOOTAGE THAT IS TOTALIZED TO AVOID LABORIOUS MANUAL MEASUREMENT AND COMPUTATION. OTHER FEATURES SUCH AS RATE INDICATION, LOW LEVEL DETECTION, CLOSED LOOP CONTROLS AND TIMED INTERLOCKING BETWEEN THE INTEGRATOR OUTPUT AND THE CONVEYOR MOTOR CONTROL, AND THE LIKE, ARE INCORPORATED INTO THE SYSTEM.

Inventors

• 👤 Frank S Hyer
• 👤 Raymond Karosas

Bibliographic Details