Fluid ratio control

Claim 1

IN A SYSTEM FOR CONTROLLING THE PERCENTAGE OF AN ADDITIVE MATERIAL IN A MIXTURE OF MATERIALS, FIRST TRANSDUCER MEANS FOR GENERATING AN ELECTRICAL PULSES FOR EACH UNIT OF SAID MIXTURE, SECOND TRANSDUCER MEANS FOR GENERATING AN ELECTRICAL PULSE FOR EACH UNIT OF SAID ADDITIVE MATERIAL, RATIO CONTROLLER MEANS FOR DIVIDING THE FREQUENCY OF THE PULSES FROM SAID SECOND TRANSDUCER MEANS BY A FACTOR CORRESPONDING TO THE PERCENTAGE OF SAID MIXTURE WHICH SAID ADDITIVE MATERIAL IS TO COMPRISE, AND A BIDIRECTIONAL PULSE COUNTER CONNECTED TO BOTH SAID FIRST TRANSDUCER MEANS AND TO SAID RATIO CONTROLLER MEANS AND ADAPTED TO ADD THE PULSES FROM SAID FIRST TRANSDUCER MEANS AND SUBTRACT THE PULSES FROM SAID RATIO CONTROLLER MEANS, AND CONTROL MEANS COUPLED TO SAID BI-DIRECTIONAL PULSE COUNTER FOR VARYING THE QUANTITY OF SAID ADDITIVE MATERIAL SUPPLIED TO SAID MIXTURE IN RESPONSE TO THE OUTPUT OF SAID BI-DIRECTIONAL COUNTER, THEREBY CONTROLLING THE PERCENTAGE OF SAID ADDITIVE MATERIAL IN SAID MIXTURE.

Claim 3

THE METHOD OF MAINTAINING A PRE-SELECTED RELATIONSHIP BETWEEN THE RESPECTIVE FLOW RATES OF A PLURALITY OF MATERIALS FLOWING IN INDIVIDUAL FLOW PATHS WHICH COMPRISES; GENERATING A PULSED ELECTRICAL CONTROL SIGNAL WHOSE PULSES RECURRENCE FREQUENCY IS PROPORTIONAL TO THE SUM OF THE FLOW RATES OF SAID MATERIALS; AND FOR EACH OF SAID MATERIALS; (1) DETERMINING THE FLOW RATE THEREOF, (2) REPRESENTING SAID MATERIAL BY A PRIMARY PULSED ELECTRICAL SIGNAL OF WHICH A PREDETERMINED FIXED NUMBER OF PULSES REPRESENTS A UNIT QUANTITY OF SAID MATERIAL FLOWING IN ITS FLOW PATH, (3) DIVIDING THE PULSE RECURRENCE FREQUENCY OF SAID PRIMARY SIGNAL BY A FACTOR WHICH IS EQUAL TO THE RATIO BETWEEN THE DESIRED FLOW RATE OF SAID MATERIAL AND THE SUM OF THE DESIRED FLOW RATE OF SAID MATERIAL AND THE SUM PRODUCING A SECONDARY PULSED ELECTRICAL SIGNAL OF WHICH N PULSES REPRESENT SAID UNIT QUANTITY OF MATERIAL, WHEREIN N IS EQUAL TO THE RECIPROCAL OF THE DESIRED RATIO BETWEEN THE FLOW RATE OF SAID MATERIAL AND THE SUM OF THE FLOW RATES OF ALL OF SAID MATERIAL AND THE SUM OF THE FLOW RATES BETWEEN THE PULSE RECURRENCE FREQUENCIES OF SAID SECONDAWRY SIGNAL AND SAID CONTROL SIGNAL AND GENERATING AN ERROR SIGNAL WHOSE MAGNITUDE IS PROPORTIONAL TO THE MAGNITUDE OF SAID DIFFERENCE, AND (5) VARYING THE FLOW RATE OF SAID MATERIAL IN RESPONSE TO CHANGES IN THE MAGNITUDE OF SAID ERROR SIGNAL IN SUCH MANNER AS TO EQUATE SAID ERROR SIGNAL TO ZERO.

Claim 4

THE METHOD OF MAINTAINING A PRE-SELECTED RELATIONSHIP BETWEEN THE RESPECTIVE FLOW RATES OF A PLURALITY OF MATERIALS FLOWING IN INDIVIDUAL FLOW PATHS WHICH COMPRISES; GENERATING A PULSED ELECTRICAL CONTROL SIGNAL WHOSE PULSES RECURRENCE FREQUENCY IS PROPORTIONAL TO THE SUM OF THE FLOW RATES OF SAID MATERIALS; AND FOR EACH OF SAID MATERIALS; (1) DETERMINING THE FLOW RATE THEREOF, (2) REPRESENTING SAID MATERIAL BY A PRIMARY PULSED ELECTRICAL SIGNAL OF WHICH A PREDETERMINED FIXED NUMBER OF PULSES REPRESENTS A UNIT QUANTITY OF SAID MATERIAL FLOWING IN ITS FLOW PATH, (3) DIVIDING THE PULSE RECURRENCE FREQUENCY OF SAID PRIMARY SIGNAL BY A FACTOR WHICH IS EQUAL TO THE RATIO BETWEEN THE DESIRED FLOW RATE OF SAID MATERIAL AND THE SUM OF THE DESIRED FLOW RATE OF SAID MATERIAL AND THE SUM PRODUCING A SECONDARY PULSED ELECTRICAL SIGNAL OF WHICH N PULSES REPRESENT SAID UNIT QUANTITY OF MATERIAL, WHEREIN N IS EQUAL TO THE RECIPROCAL OF THE DESIRED RATIO BETWEEN THE FLOW RATE OF SAID MATERIAL AND THE SUM OF THE FLOW RATES OF ALL OF SAID MATERIAL AND THE SUM OF THE FLOW RATES BETWEEN THE PULSE RECURRENCE FREQUENCIES OF SAID SECONDAWRY SIGNAL AND SAID CONTROL SIGNAL AND GENERATING AN ERROR SIGNAL WHOSE MAGNITUDE IS PROPORTIONAL TO THE MAGNITUDE OF SAID DIFFERENCE, AND (5) VARYING THE FLOW RATE OF SAID MATERIAL IN RESPONSE TO CHANGES IN THE MAGNITUDE OF SAID ERROR SIGNAL IN SUCH MANNER AS TO EQUATE SAID ERROR SIGNAL TO ZERO.