Airspeed indicator having non-uniform scale

Claim 1

AN AIRSPEED INDICATOR COMPRISING A FACE DIAL HAVING AIRSPEED DESIGNATIONS THEREON, A POINTER ASSOCIATED WITH SAID DIAL FOR POINTIONG TO A GIVEN DESIGNATION THEREON, A PRESSURE RESPONSIVE MOTIVE MEANS RESPONSIVE TO AIRSPEED, DRIVE MEANS CONNECTING SAID POINTER IN DRIVEN RELATIONSHIP WITH SAID PRESSURE RESPONSIVE MOTIVE MEANS FOR EFFECTING POINTER MOVEMENT WHICH IS A NON-LINEAR FUNCTION OF SAID PRESSURE RESPONSIVE MOTIVE MEANS MOVEMENT, SAID DRIVE MEANS INCLUDING A PAIR OF ROTATABLY MOUNTED SHAFTS HAVING THEIR RESPECTIVE AXES ANGULARLY DISPOSED IN A COMMON PLANE, MEANS CONNECTING ONE OF SAID SHAFTS IN DRIVEN RELATIONSHIP TO SAID PRESSURE RESPONSIVE MOTIVE MEANS, MEANS CONNECTING THE OTHER OF SAID SHAFTS IN DRIVING RELATIONSHIP TO SAID POINTER, A PLURALITY OF RADIALLY EXTENDING LEVERS AXIALLY SPACED ALONG SAID ONE SHAFT, EACH OF SAID LEVERS BEING ANGULARLY DISPOSED ABOUT SAID ONE SHAFT WITH RESPECT TO ONE ANOTHER, AT LEAST ONE LEVER CONNECTED TO SAID OTHER SHAFT AND EXTENDING RADIALLY THEREFROM, AND SPRING MEANS NORMALLY URGING SAID OTHER SHAFTS SO THAT THE LEVER CONNECTED THERETO SEQUENTIALLY ENGAGES WITH EACH OF SAID LEVERS CONNECTED TO SAID ONE SHAFT WHEREBY SAID OTHER SHAFT FOLLOWS THE MOVEMENT OF SAID ONE SHAFT IN RESPONSE TO THE OPERATION OF SAID PRESSURE RESPONSIVE MOTIVE MEANS.