Ignition distributor mechanism

Claim 1

IN A TIMING DEVICE FOR AN INTERNAL COMBUSTION ENGINE HAVING AN IGNITION SWITCHING MEANS AND SWITCH OPERATING CAM MEANS THEREFOR, THE IMPROVEMENT COMPRISING; MEANS FOR DRIVING THE CAM MEANS IN TIMED RELATIONSHIP TO SAID ENGINE ESTABLISHING AN INDEXED POSITION FOR THE IGNITION SWITCHING MEANS RELATIVE TO THE CAM MEANS; ENGINE LOAD RESPONSIVE MEANS FOR SHIFTING THE SWITCHING MEAND RELATIVE TO THE CAM MEANS TO ESTABLISH AN ADVANCED IGNITION POSITION DURING A PART ENGINE LOAD CONDITION, SAID ENGINE LOAD RESPONSIVE MEANS RETURNING THE SWITCHING MEANS TO AN INDEXED POSITION AT A HIGHER ENGINE LOAD CONDITION; AND ENGINE SPEED RESPONSIVE MEANS FOR SHIFTING SAID CAM MEANS RELATIVE TO SAID SWITCHING MEANS TO A RETARDED IGNITION POSITION DURING A FIRST PORTION OF A FURTHER INCREASE IN ENGINE LOAD AND SPEED, SAID ENGINE SPEED RESPONSIVE MEANS REVERSELY SHIFTING THE CAM MEANS RELATIVE TO THE SWITCHING MEANS DURING A SECOND PORTION OF AN INCREASE IN ENGINE SPEED AND LOAD THROUGH THE INDEXED POSITION TO AN ADVANCED IGNITION POSITION.