Machine tool power drawbolt mechanism

Claim 1

IN A MACHINE TOOL, A MECHANISM FOR ROTATABLY DRIVING A POWER DRAWBOLT THROUGH A SPINDLE COMPRISING IN COMBINATION: (A) A DRIVE SHAFT IN AXIAL ALIGNMENT WITH THE DRAWBOLT, (B) A FLYWHEEL MEMBER FIXED ON SAID DRIVE SHAFT FOR ROTATION THEREWITH, (C) A CLUTCH MEMBER RECEIVED AROUND SAID DRIVE SHAFT FOR ROTATION RELATIVE THERETO AND AXIAL MOVEMENT THEREALONG TO ENGAGE AND DRIVE THE DRAWBOLT, THE CLUTCH MEMBER INCLUDING A CONICAL CAM PORTION ADJACENT TO SAID FLYWHEEL MEMBER, (D) BIAS MEANS FOR URGING SAID CLUTCH MEMBER TOWARD SAID FLYWHEEL MEMBER AND AWAY FROM THE DRAWBOLT, (E) A PLURALITY OF BALLS RECEIVED IN CONTACT BETWEEN SAID FLYWHEEL MEMBER AND CONICAL CAM PORTION FOR MOVEMENT OF SAID CLUTCH MEMBER AGAINST SAID BIAS MEANS TO ENGAGE THE DRAWBOLT WHEN MOVED RADIALLY OUTWARD FROM SAID DRIVE SHAFT, (F) A CAGE MEMBER RECEIVED AROUND SAID DRIVE SHAFT AND ROTATABLE RELATIVE TO SAID DRIVE SHAFT AND CLUTCH MEMBER, SAID CAGE MEMBER HAVING POCKETS EXTENDING RADIALLY OUTWARD TO MAINTAIN SAID BALLS SEPARATED AND SPACED AROUND THE FLYWHEEL AND CLUTCH MEMBERS, (G) MEANS FOR ROTATING SAID DRIVE SHAFT, AND (H) MEANS FOR ROTATING SAID CLUTCH MEMBER AT A RATE REDUCED FROM THE RATE OF SAID DRIVE SHAFT, SAID BALLS THEREBY ROLLING BETWEEN THE FLYWHEEL AND CLUTCH MEMBER AND SIMULTANEOUSLY ORBITING AROUND SAID DRIVE SHAFT WITH SAID CAGE MEMBER WHEREBY SAID BALLS ARE THROWN RADIALLY OUTWARD IN SAID POCKETS AND SAID CLUTCH MEMBER IS SHIFTED AGAINST THE BIAS MEANS TO ENGAGE THE DRAWBOLT.