Ignition distributor with friction preventive means in the advance mechanism

Claim 1

AN IGNITION DISTRIBUTION FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING A HOUSING, A SHAFT JOURNALLED IN SAID HOUSING AND ADAPTED TO BE DRIVEN IN ACCORDANCE WITH ENGINE SPEED, A DISTRIBUTOR CAM MEMBER MOUNTED ON THE END OF SAID SHAFT DISPOSED WITHIN SAID HOUSING IN A MANNER TO PERMIT ROTATION OF SAID CAM WITH RESPECT TO SAID SHAFT, A SUPPORT MEMBER SECURED TO ROTATE WITH SAID SHAFT, A PAIR OF CENTRIFUGAL WEIGHTS PIVOTALLY SECURED TO SAID SUPPORT MEMBER IN A MANNER TO MOVE OUTWARDLY UNDER THE INFLUENCE OF CENTRIFUGAL FORCE TO THE EXTENT DEPENDENT UPON THE ROTATIONAL SPEED OF SAID SHAFT, A PIN EXTENDING UPWARDLY FROM EACH OF SAID WEIGHTS, AN ARM MEMBER EXTENDING FROM EACH SIDE OF SAID CAM MEMBER, SAID ARM MEMBERS BEING POSITIONED PARALLEL TO SAID SUPPORT MEMBERS AND EACH OF SAID ARM MEMBERS HAVING A SUITABLE ANGULARLY DISPOSED SLOT THEREIN RECEIVING SAID PINS EXTENDING FROM ONE OF SAID CENTRIFUGAL WEIGHTS, THE GOEMETRY OF SID PINS AND SAID SLOTS BEING SUCH AS TO PRODUCE THE DESIRED CAM ROTATION TO WEIGHT DISPLACEMENT CHARACTERISTICS WHEN SAID SHAFT IS ROTATED, AND A SLEEVE MEMBER DISPOSED OVER EACH OF SAID PINS IN A MANNER SO THAT DIRECT ENGAGEMENT OF THE EDGES OF THE SLOTS BY SAID PINS IS PREVENTED, SAID SLEEVE MEMBER BEING FORMED TO PROVIDE AREA RATHER THAN LINE SLIDING CONTACT WITH THE EDGES OF THE SLOTS.