Variable speed mechanism

Claim 1

SPEED VARIATION MECHANISM COMPRISING A DRIVE SHAFT TO BE DRIVEN AT A CONSTANT SPEED, A PAIR OF DISCS MOUNTED ON AND KEYED TO SAID DRIVE SHAFT FOR ROTATION THEREWITH BUT BEING TRANSVERSELY MOVABLE RELATIVE TO SAID SHAFT AND TO EACH OTHER, MEANS FOR MOVING SAID DISC RELATIVE TO EACH OTHER BUT CENTERED RELATIVE TO SAID SHAFT SO THAT SAID DISCS COUNTERBALANCE EACH OTHER DURING ROTATION WITH SAID SHAFT, ONE OF SAID DISCS HAVING ANNULAR CAM MEANS WHICH IS ECCENTRIC TO THE AXIS OF SAID SHAFT WHEN SAID DISCS ARE OFFSET RELATIVE THERETO AND TO EACH OTHER, AND CRANK MEANS INCLUDING CRANK ARM MOUNTED ON A CRANKSHAFT AND CARRYING A FOLLOWER ENGAGED WITH SAID CAM MEANS WHEREBY SAID CRANKSHAFT IS OSCILLATED BY SAID CAM MEANS WHEN THE LATTER IS ECCENTRICALLY DISPOSED RELATIVE TO SAID DRIVE SHAFT, ONE OF SAID DISCS BEING MOUNTED ON THE END OF SAID DRIVE SHAFT BY INTERFITTING FIRST TONGUE AND GROOVE MEANS PERMITTING SLIDEABLE MOVEMENT OF SAID DISC TRANSVERSELY OF SAID SHAFT BETWEEN CONCENTRIC AND OFFSET POSITIONS, THE OTHER OF SAID DISCS BEING MOUNTED ON SAID ONE DISC BY INTERFITTING SECOND TONGUE AND GROOVE MEANS THAT IS PARALLEL WITH SAID FIRST TONGUE AND GROOVE MEANS AND PERMITTING SLIDABLE MOVEMENT OF SAID OTHER DISC RELATIVE TO SAID ONE DISC BETWEEN CONCENTRIC AND OFFSET POSITIONS, SAID DISCS EACH HAVING AN AXIALLY DISPOSED TAPERED APERTURE THERETHROUGH WHICH JOINTLY DEFINE A SOCKET TAPERING OUTWARDLY FROM THE END OF SAID DRIVE WHEN SAID DISCS ARE CONCENTRIC, AND SAID MEANS FOR MOVING SAID DISCS COMPRISES A TAPERED CONTROL MEMBER MOUNTED COAXIALLY OF AN AXIALLY MOVABLE RELATIVE TO SAID SHAFT WITHIN SAID TAPERED APERTURES TO CONTROL THE OFFSET RELATION OF SAID DISC AND CENTER THEM RELATIVE TO SAID SHAFT.