Level indicating and control instruments

Claim 1

A VEHICLE''S FUEL SYSTEM OF THE KIND HAVING AT LEAST ONE FUEL TANK, MEANS FOR GAUGING THE FUEL CONTENTS OF THE TANK, MEANS FOR CONTROLLING THE FLOW OF FUEL TO AND FROM THE TANK, AND AN INDICATING INSTRUMENT FOR INDICATING THE CONTENTS OF THE AS GAUGED BY SAID GAUGING MEANS, THE INDICATING INSTRUMENT BEING OF THE KIND IN WHICH A POINTER IS MOUNTED ON A SHAFT AND ROTATES RELATIVE TO A SCALE ON ROTATION OF THE SHAFT, AND BEING PROVIDED WITH AN AUXILIARY POINTER, MEANS SUPPORTING THE AUXILIARY POINTER FOR ROTATION INDEPENDENTLY OF THE MAIN POINTER BUT ABOUT A COMMON AXIS, A PARI OF ACTUATING PINS, MOUNTED TO LIE PARALLEL TO BUT DISPLACED AT DIFFERENT DISTANCE FROM THE COMMON AXIS, ONE COUPLED TO THE MAIN POINTER FOR ROTATION THEREWITH ABOUT THE COMMON AXIS AND THE OTHER COUPLED TO THE AUXILIARY POINTER FOR ROTATION THEREWITH ABOUT THE COMMON AXIS, A PAIR OF CAMS, MEANS SUPPORTING EACH CAM FOR INDEPENDENT ROTATION ABOUT THE COMMON AXIS, SPRING MEANS FOR BIASING THE CAMS TOWARDS ONE ANOTHER, THE CONSTRUCTION AND ARRANGEMENT OF THE PINS AND THE CAMS BEING SUCH THAT, WHEN THE MAIN AND AUXILIARY POINTERS ARE ALIGNED WITH ONE ANOTHER, THE PINS ARE ALIGNED WITH ONE ANOTHER AND THE CAM ARE HELD APART AGAINST THE ACTION OF THE SPRING MEANS BY THE PINS, A PAIR OF ELECTRIC SWITCHES EACH HAVING CONTACTS HAVING AT LEAST TWO CONDITIONS OF OPERATION, AND MEANS SUPPORTING THE SWITCHES FOR ROTATION WITH ONE OF THE POINTERS, THE SWITCHES BEING POSITIONED WITH RESPECT TO THE CAMS TO BE ACTUATED TO CHANGE FROM ONE OPERATING CONDITION TO ANOTHER BY A RESPECTIVE ONE OF THE CAM ONLY WHEN THAT CAM IS IN CONTACT WITH THE ACTUATING PIN WHICH ROTATES WITH THE POINTER WITH WHICH THE SWITCHES ROTATE AND THE SYSTEM FURTHER COMPRISING AN ELECTRICAL CONTROL CIRCUIT FOR CONTROLLING THE OPERATION OF THE FUEL FLOW CONTROLLING MEANS, WHICH CIRCUIT COMPRISES THE CONTACTS OF THE SWITCHES PROVIDED IN THE INDICATING INSTRUMENTS.