Collet closing mechanism

Claim 1

IN A MACHINE FOR FEEDING BAR STOCK LONGITUDINALLY AND INCORPORATING A DRAW SPRING TYPE WORK-GRIPPING COLLET FOR INTERMITTENTLY HOLDING THE STOCK IN A SELECTED POSITION BY A CLOSING OF THE GRIPPING JAWS OF THE COLLET UPON THE STOCK AND RELEASING THE STOCK BY AN OPENING OF THE GRIPPING JAWS ACCORDING TO LONGITUDINAL RECIPROCATING MOVEMENT OF THE COLLET RELATIVE TO A ROTATIVELY-DRIVEN SPINDLE WITH THE COLLET BEING COOPERANT WITH A COLLET DRAW BAR RIGIDLY FIXED THERETO AND SUPPORTED WITHIN THE SPINDLE AND WITH THE ROTATIVE MOVEMENT OF THE SPINDLE BEING UNISONLY IMPARTED TO THE COLLET AND COLLET DRAW BAR AND WITH A WORK ADVANCING FEED TUBE RECIPROCABLE LONGITUDINALLY IN AND RELATIVE TO THE COLLET DRAW BAR, THE IMPROVEMENT IN A CAM-OPERATED COLLET CLOSING ASSEMBLY FOR DRAWING THE COLLET REARWARDLY RELATIVE TO THE AXIS OF THE SPINDLE FOR THE CLOSING OF THE GRIPPING JAWS AND COMPRISING, A COLLET ADJUSTING SLEEVE UPON AND SECURED TO THE COLLET DRAW BAR AND RECIPROCABLE THEREWITH WHILE BEING CONTINUOUSLY KEYED TO THE SPINDLE FOR RECEIVING DRIVING POWER THEREFROM, A COLLET CAM SLEEVE SLEEVED ABOUT SAID COLLET ADJUSTING SLEEVE, A FIRST COLLET CLOSING CAM SLEEVED UPON SAID COLLET CAM SLEEVE, A SECOND COLLET SLOSING CAM SLEEVED UPON SAID COLLET CAM SLEEVE IN COAXIAL ARRANGEMENT RELATIVE TO SAID FIRST COLLET CLOSING CAM, AND MEANS FOR ROTATING SAID SECOND COLLET CLOSING CAM INTO CAMMED RELATIONSHIP WITH SAID FIRST COLLET CLOSING CAM FOR IMPARTING A RECTILINEARLY REARWARD MOVEMENT OF SAID FIRST COLLET CLOSING CAM RELATIVE TO SAID COLLET CAM SLEEVE WITH A CONCOMITANT RECTILINEARLY REARWARD MOVEMENT OF SAID COLLET ADJUSTMENT SLEEVE AND THE COLLET DRAW BAR AND COLLET INTERCONNECTED THEREWITH RELATIVE TO THE SPINDLE.