Control circuit

Claim 1

IN AN INGREDIENT MIXING SYSTEM, CONTROL CIRCUITRY FOR MEASURING THE FLOW OF AN INGREDIENT INTO A HOPPER COMPRISING A COMBINATION; A CONDITION POTENTIOMETER HAVING A TAP DIFFERENTIALLY POSITIONABLE IN RESPONSE TO THE INCREASE IN WEIGHT OF AN INGREDIENT IN A HOPPER AND PROVIDING AN OUTPUT VOLTAGE PROPORTIONAL TO THE WEIGHT OF SAID INGREDIENT, MEANS PRODUCING OF FIRST VOLTAGE OF OPPOSITE POLARITY TO THAT OF SAID CONDITION POTENTIOMETER AND PROPORTIONAL TO THE FINAL WEIGHT OF THE INGREDIENT DESIRED, MEANS PRODUCING A SECOND VOLTAGE OF POLARITY SIMILAR TO THAT OF SAID CONDITION POTENTIOMETER AND PROPORTIONAL TO THE AMOUNT OF INGREDIENT IN SUSPENSION AFTER AN INDICATION OF THE DESIRED WEIGHT OF THE INGREDIENT IS REGISTERED ON SAID CONDITION POTENTIOMETER AND COMPENSATING FOR SAID INFLIGHT AMOUNT OF INGREDIENT, MEANS PRODUCING A THIRD VOLTAGE OF POLARITY SIMILAR TO THAT OF SAID CONDITION POTENTIOMETER VOLTAGE AND PROPORTIONAL TO SAID FIRST VOLTAGE, MEANS PRODUCING A FOURTH VOLTAGE OF OPPOSITE POLARITY TO THAT OF SAID CONDITION POTENTIOMETER VOLTAGE AND PROPORTIONAL TO THE AMOUNT OF OVERWEIGHT PERMISSIBLE OF THE LOADING INGREDIENT, MEANS PRODUCING A FIFTH VOLTAGE OF POLARITY SIMILAR TO SAID CONDITION POTENTIOMETER VOLTAGE OF PROPORTIONAL TO THE AMOUNT OF UNDERWEIGHT LOADING PERMISSIBLE, FIRST SWITCHING MEANS OPERABLY CONNECTING IN A FIRST SIGNAL CIRCUIT SAID CONDITION POTENTIOMETER AND SAID FIRST, SECOND AND THIRD VOLTAGE PRODUCING MEANS AND OBTAINING A RESULTANT VOLTAGE THEREFROM, A FIRST SIGNAL OUTPUT MEANS OPERATIVELY CONNECTED IN CIRCUIT WITH SAID FIRST SWITCHING MEANS AND RESPONSIVE TO A BALANCED RESULTANT VOLTAGE FROM SAID FIRST SIGNAL CIRCUIT TO DECREASE THE DELIVERY RATE OF SAID IN-ST GREDIENT TO SAID HOPPER, SECOND SWITCHING MEANS OPERABLY CONNECTING IN A SECOND CIRCUIT SAID CONDITION POTENTIOMETER AND SAID FIRST AND SECOND VOLTAGE PRODUCING MEANS AND PRODUCING THE RESULTANT VOLTAGE THEREFROM, SECOND SIGNAL OUTPUT MEANS OPERATIVELY CONNECTED IN CIRCUIT WITH SAID SECOND SWITCHING MEANS TO TOTALLY CUT OFF THE FEEDING OF THE INGREDIENT INTO A HOPPER, THIRD SWITCHING MEANS OPERABLY CONNECTING IN A THIRD SIGNAL CIRCUIT SAID CONDITION POTENTIOMETER AND SAID FIRST AND FOURTH VOLTAGE PRODUCING MEANS FOR PRODUCING A RESULTANT VOLTAGE THEREFROM, A THIRD SIGNAL OUTPUT MEANS OPERATIVELY CONNECTED IN CIRCUIT WITH SAID THIRD SWITCHING MEANS AND RESPONSIVE TO THE RESULTANT VOLTAGE THEREFROM TO INDICATED AN EXCESS OF INGREDIENT IN SAID HOPPER, A FOURTH SWITCHING MEANS OPERABLY CONNECTING IN A FOURTH SIGNAL CIRCUIT SAID CONDITION POTENTIOMETER AND SAID FIRST AND FIFTH VOLTAGE PRODUCING MEANS AND PRODUCING A RESULTANT VOLTAGE THEREFROM, A FOURTH SIGNAL OUTPUT MEANS OPERATIVELY CONNECTED IN CIRCUIT WITH SAID FOURTH SWITCHING CIRCUIT MEANS RESPONSIVE TO THE RESULTANT VOLTAGE THEREFROM TO INDICATE A DEFICIENCY OF INGREDIENT IN SAID HOPPER.