Control apparatus

Claim 1

APPARATUS FOR AUTOMATICALLY FILLING A FUEL TANK TO AND MAINTAINING THE FUEL TANK AT A DESIRED QUANTITY COMPRISING, IN COMBINATION: FUEL TANK MEANS HAVING A TOTAL CAPACITY FOR A GIVEN QUANTITY OF FUEL; AUTOMATICALLY REBALANCEABLE BRIDGE CIRCUIT MEANS INCLUDING INDICATOR MEANS ATTACHED TO A MOTOR OUTPUT, A FIRST POTENTIOMETER CALIBRATED FOR SETTING A DESIRED AMOUNT OF FUEL IN SAID FUEL TANK AS 100% ON SAID INDICATOR MEANS, AND A SECOND POTENTIOMETER CONNECTED TO AN OUTPUT OF SAID FIRST POTENTIOMETER AND ATTACHED TO THE MOTOR OUTPUT, SAID SECOND POTENTIOMETER PROVIDING A REBALANCE SIGNAL IN SAID BRIDGE CIRCUIT MEANS, AND SAID INDICATOR MEANS PROVIDING OUTPUTS INDICATING FUEL QUANTITIES FROM 0% TO OVER 100% OF THE DESIRED AMOUNT; FIRST AND SECOND VARIABLE SIGNAL SUPPLYING MEANS, SAID FIRST AND SECOND VARIABLE SIGNAL SUPPLYING MEANS SUPPLYING OUTPUT SIGNALS WHICH VARY IN MAGNITUDE AND REVERSE IN PHASE; FIRST MEANS CONNECTING THE MOTOR OUTPUT MEANS OF SAID BRIDGE CIRCUIT MEANS TO SAID FIRST AND SECOND VARIABLE SIGNAL SUPPLYING MEANS FOR VARYING THE OUTPUT SIGNALS FROM SAID FIRST AND SECOND VARIABLE SIGNAL SUPPLYING MEANS FROM A MAXIMUM OF A FIRST PHASE AT 95% OF FULL SETTING TO A MAXIMUM OF A PHASE OPPOSITE THE FIRST PHASE AT 105% OF THE FULL SETTING; CONDUIT MEANS ATTACHED TO SAID FUEL TANK MEANS, SAID CONDUIT MEANS SUPPLYING FUEL TO SAID FUEL TANK MEANS; ELECTRICALLY OPERABLE VALVE MEANS ATTACHED IN OPERATIVE RELATION TO SAID CONDUIT MEANS FOIR CONTROLLING FUEL FLOW THERETHROUGH; SUMMING MEANS CONNECTED TO SAID ELECTRICALLY OPERABLE VALVE MEANS, SAID SUMMING MEANS INCLUDING INPUT MEANS, AND SAID SUMMING MEANS APPLYING CONTROL SIGNALS TO SAID VALVE MEANS INDICATIVE OF ANY INPUT SIGNALS SUPPLIED TO SAID INPUT MEANS OF SAID SUMMING MEANS; MEANS CONNECTING SAID FIRST VARIABLE SIGNAL SUPPLYING MEANS TO SAID INPUT MEANS OF SAID SUMMING MEANS; INTEGRATING MEANS CONNECTING BETWEEN SAID SECOND SIGNAL SUPPLYING MEANS AND SAID INPUT MEANS OF SAID SUMMING MEANS FOR SUPPLYING A SIGNAL THERETO; THIRD AND FOURTH VARIABLE SIGNAL SUPPLYING MEANS ATTACHED TO SAID MOTOR OUTPUT MEANS OF SAID BRIDGE CIRCUIT MEANS, SAID THIRD AND FOURTH SIGNAL SUPPLYING MEANS PROVIDING OUTPUT SIGNALS AT OUTPUT MEANS THEREOF WHICH VARY AS A FUNCTION OF POSITION OF SAID MOTOR OUTPUT MEANS; FIFTH AND SIXTH VARIABLE SIGNAL SUPPLYING MEANS FOR PROVIDING OUTPUT SIGNALS AT OUTPUT MEANS THEREOF RESPECTIVELY, SAID FIFTH AND SIXTH SUPPLYING MEANS INCLUDING CALIBRATED SETTING MEANS AND PROVIDING PREDETERMINED OUTPUTS AT GIVEN SETTINGS ON SAID CALIBRATED SETTING MEANS;