Vehicle road speed control mechanism

Claim 1

A VEHICLE ROAD SPEED MAINTAINING CONTROL COMPRISING; A FLUID PRESSURE FIRST SYSTEM INCLUDING, FIRST AND SECOND SOURCES OF DIFFERENTIAL FLUID PRESSURE, A SERVOMOTOR HAVING A POWER WALL AND FIRST AND SECOND FLUID PRESSURE CHAMBERS SEPARATED THEREBY, MEANS FOR CONNECTING SAID POWER WALL TO THE VEHICLE ENGINE THROTTLE VALVE TO INCREASE AND DECREASE VEHICLE SPEED BY POWER MOVEMENT OF SAID POWER WALL, FIRST CONDUIT MEANS HAVING RESTRICTIVE FLUID FLOW CONNECTION WITH SAID FIRST PRESSURE SOURCE AND A VARIABLE ORIFICE CONNECTION WITH SAID SECOND PRESSURE SOURCE AND CONNECTED TO SAID SERVOMOTOR FIRST CHAMBER, HYSTERESIS ACTUATED ORIFICE CONTROL MEANS INCLUDING A HYSTERESIS ACTUATOR FOR CONTROLLING SAID ORIFICE AND HAVING REFERENCE SPEED MEANS FOR IMPARTING A REFERENCE SPEED SIGNAL TO SAID ORIFICE CONTROL MEANS, SECOND CONDUIT MEANS HAVING A RESTRICTIVE FLUID FLOW CONNECTION WITH SAID FIRST FLUID PRESSURE SOURCE AND A VARIABLE ORIFICE CONNECTION WITH SAID SECOND FLUID PRESSURE SOURCE CONTROLLED BY SAID ORIFICE CONTROL MEANS IN INVERSE RELATION TO CONTROL OF SAID FIRST CONDUIT MEANS ORIFICE CONNECTION BY SAID ORIFICE CONTROL MEANS AND CONNECTED TO SAID REFERENCE SPEED MEANSD AND FURTHER CONNECTED TO SAID SERVOMOTOR SECOND CHANBER, FIRST VALVE MEANS FOR CONNECTING AND DISCONNECTING SAID FIRST AND SECOND SERVOMOTOR CHAMBERS TO SAID SECOND PRESSURE SOURCE AND HAVING REFERENCE SPEED SETTING MEANS OPERABLE TO SET SAID REFERENCE SPEED MEANS CONCURRENTLY WITH SAID DISCONNECTING ACTION, AND SECOND VALVE MEANS FOR CONNECTING AND DISCONNECTING SAID FIRST PRESURE SOURCE WITH SAID FIRST AND SECOND CONDUIT MEANS; A SECOND SYSTEM HAVING A SOURCE OF ENERGY FOR POWERING SAID FIRST VALVE MEANS, SYSTEM ENERGIZING AND DEENERGIZING CONTROL MEANS INCLUDING MEANS FOR OPENING AND CLOSING SAID SECOND VALVE MEANS AND FOR POWERING SAID FIRST VALVE MEANS FROM SAID SOURCE OF ENERGY TO DISCONNECT SAID FIRST AND SECOND SERVOMOTOR CHAMBERS FROM SAID SECOND PRESSURE SOURCE AND FOR SETTING SAID REFERENCE SPEED MEANS WHEN SAID SECOND VALVE MEANS IS OPENED; AND A VEHICLE SPEED SENSITIVE POWER GENERATOR FOR GENERATING POWER AS A FUNCTION OF VEHICLE SPEED AND ACTUATING SAID HYSTERSIS ACTUATOR TO CONTROL SAID ORIFICE CONTROL MEANS COOPERATIVELY WITH SAID REFEENCE SPEED MEANS TO CONTROL FLUID PRESSURES DELIVERED TO SAID SERVOMOTOR CHAMBERS FOR MAINTAINING A CONSTANT VEHICLE SPEED.