Controller whose output is proportional to a meter pointer position

Claim 1

A CONTROLLER WHOSE OUTPUT IS PROPORTIONAL TO A METER POINTER POSITION INCLUDING, IN COMBINATION, A METER INCLUDING A SCALE AND AN INDICATING POINTER ADAPTED TO TRAVERSE SAID SCALE IN ITS INDICATING MOVEMENTS, A PIVOTALLY MOUNTED MANUALLY POSITIONABLE SET POINT ARM ADAPTED TO BE MANUALLY POSITIONED AT ANY VALUE ON SAID SCALE AND MOVABLE INTO POSITION IN ALIGNMENT WITH SAID POINTER IN ANY INDICATING POSITION IT HAS ASSUMED, AND MECHANISM FOR CAUSING SAID SET POINT ARM TO MOVE INTO POSITION IN ALIGNMENT WITH SAID POINTER, SAID MECHANISM INCLUDING A PAIR OF SPACED APART INDUCTIVE COUPLINGS ON SAID SET POINT ARM WHICH ARE MOVABLE THEREWITH, SHIELDING MEANS MOVABLE WITH SAID POINTER AS IT TRAVERSES THE METER SCALE IN ITS INDICATING MOVEMENTS, ONE INDUCTIVE COUPLING BEING IN THE PATH OF MOVEMENT OF SAID SHIELDING MEANS AS IT MOVES IN ONE DIRECTION AND THE OTHER INDUCTIVE COUPLING BEING IN THE PATH OF MOVEMENT OF SAID SHIELDING MEANS AS IT MOVES IN THE OTHER DIRECTION, SAID SHIELDING MEANS BEING DIMENSIONALLY SUCH AND SO RELATED TO SAID SPACED APART INDUCTIVE COUPLINGS THAT WHEN SAID POINTER AND SET POINT ARM ARE IN ALIGNMENT, THE SHIELDING MEANS WILL BE REMOVED FROM EACH OF SAID INDUCTIVE COUPLINGS, AND WHEN SAID POINTER AND SET POINT ARM ARE OUT OF ALIGNMENT, SAID SHIELDING MEANS WILL EXTEND INTO ONE OR THE OTHER OF SAID INDUCTIVE COUPLINGS, AN ELECTRIC CIRCUIT, SAID SPACED APART INDUCTIVE COUPLINGS BEING CONNECTED TO SAID ELECTRIC CIRCUIT, A DRIVE MEANS CONNECTED TO SAID ELECTRIC CIRCUIT, SAID ELECTRIC CIRCUIT INCLUDING MEANS CAUSING THE OUTPUT THEREOF TO BE OF ONE POLARITY WHEN SAID SHIELDING MEANS IS IN ONE INDUCTIVE COUPLING AND TO BE OF THE OPPOSITE POLARITY WHEN THE SHIELDING MEANS IS IN THE OTHER INDUCTIVE COUPLING TO CAUSE REVERSIBLE OPERATION OF SAID DRIVE MEANS AND TO CAUSE NO CURRENT TO FLOW IN THE OUTPUT WHEN THE SHIELDING MEANS IS REMOVED FROM EACH INDUCTIVE COUPLING AND THE POINTER AND SET POINT ARM ARE IN ALIGNMENT, AND FURTHER MEANS CONNECTING SAID DRIVE MEANS TO SAID SET POINT ARM FOR MOVING THE SET POINT ARM IN A DIRECTION TO CAUSE IT TO BE ALIGNED WITH SAID POINTER.