Batch weighing control unit

Claim 1

IN A BATCH WEIGHTING SYSTEM FOR EFFECTING THE DELIVERY OF DESIRED QUANTITES OF FIRST AND SECOND INGREDIENTS WHEREIN SAID FIRST INGREDIENT CONTAINS AN ASCERTAINABLE PROPORTION OF SAID SECOND INGREDIENT MIXED THEREIN, AN AUTOMATIC CONTROL UNIT COMPRISING MEANS RESPOSIVE TO A CONTROL MEDIA FOR DEFINING FIRST AND SECOND ELECTRICAL QUANTITIES REPRESENTATIVE OF THE MAGNITUDE OF THE DESIRED PURE QUANTITIES OF SAID FIRST AND SECOND INGREDIENTS TO BE DELIVERED, A FIRST COMPARISON CIRCUIT INCLUDING SAID FIRST ELECTRICAL QUANITITY FOR PERFORMING A CONTROL FUNCTION WHEN THE SENSED DELIVERED QUANITITY OF SAID FIRST INGREDIENT CORRESPONDS TO THE DESIRED QUANTITY THEREOF, A SECOND COMPARISON CIRCUIT INCLUDING SAID SECOND ELECTRICAL QUANTITY FOR PERFORMING A CONTROL FUNCTION WHEN THE SENSED DELIVERED WEIGHT OF SAID SECOND INGREDIENT CORRESPONDS TO THE DESIRED QUANTITY THEREOF, MEANS RESPONSIVE TO A COMPARISON OF SAID FIRST SECOND ELECTRICAL QUANTITIES FOR ESTABLISHING A REFERENCE ELECTRICAL QUANTITY REPRESENTATIVE OF THE SUMMATION THEREOF, MEANS RESPONSIVE TO THE AMOUNT OF SAID SECOND INGREDIENT INCLUDED IN SAID FIRST INGREDIENT AND TO SAID REFERENCE ELECTRICAL QUANTITY FOR COMPLEMENTALLY MODIFYING THE RESPONSE CHARACTERISTICS OF SAID FIRST AND SECOND CONTROL CIRCUITS TO HAVE SAID FIRST CIRCUIT PERFORM