Electrical control and indicating system for motor vehicles

Claim 1

IN A SYSTEM FOR REGULATING THE SPEED OF A MOTOR VEHICLE HAVING A THROTTLE; SETTABLE MEANS FOR PRODUCING A REFERENCE VOLTAGE PROPORTIONAL TO THE DESIRED MAXIMUM SPEED OF THE VEHICLE; ADJUSTABLE MEANS UNDER THE CONTROL OF THE OPERTOR FOR PRODUCING VARIABLE REFERENCE VOLATAGES; A SPEED VOLTAGE GENERATOR OPERATED BY THE POWER TRAIN OF THE VEHICLE FOR PRODUCING SPEED VOLTAGES PROPORTIONAL TO THE SPEED OF THE VEHICLE; A COMPARATOR CONNECTED TO RECEIVE THE REFERENCE VOLTAGES AND THE SPEED VOLTAGE FOR PRODUCING AN ERROR VOLTAGE THAT IS PROPORTIONAL TO THE DIFFERENCE BETWEEN THE SPEED VOLTAGE AND THE REFERENCE VOLTAGE; AN ELECTRICAL CONTROL VALVE CONNECTED TO DIRECT THE VOLTAGE FROM SAID ADJUSTABLE MEANS EXCEEDS THE REFERENCE VOLTAGE INTERRUPT THE FLOW OF THE REFERENCE VOLTAGE FROM SAID SETTABLE MEANS TO SAID COMPARATOR UNTIL THE REFERENCE VOLTAGE FROM SAID ADJUSTABLE MEANS EXCEEDS THE REFERENCE VOLTAGE FROM SAID SETTABLE MEANS WHEN SAID CONTROL VALVE INTERRUPTS THE REFERENCE VOLTAGE FROM SAID SETTABLE MEANS TO DIRECTS THE REFERENCE VOLTAGE FROM SAID SETTABLE MEANS TO SAID COMPARATOR; AND A MOTOR OPERATING IN RESPONSE TO THE ERROR VOLTAGE FROM SAID COMPARATOR AND CONNECTED TO ACTUATE THE THROTTLE FOR VARYING THE SPEED OF THE VEHICLE IN ACCORDANCE WITH THE ERROR VOLTAGE.