Bar-feed and change attachment for automatic lathes

Claim 1

IN A BAR-FEEDING AND CHANGING ATTACHMENT FOR AUTOMATIC LATHES, HAVING A PLUNGER MOVABLE BY MOTOR MEANS FOR THE BAR BEING MACHINED, WHICH PLUNGER IS EQUIPPED WITH A COLLET PIVOTED THERETO TO GRIP THE BAR REAR END AND TO PERMIT WITHDRAWAL OF THE BAR REMNANT, THE IMPROVEMENT COMPRISING A STAIONARY CHUCKING APPLIANCE CLAMPABLE TO THE WITHDRAWN BAR REMNANT AND THEN TO A FRESHLY INSERTED BAR WHEN SAID PLUNGER HAS BEEN ENTIRELY WITHDRAWN, AND AN ACTUATING APPLIANCE COMPRISING A CONTROL SHAFT, THREE CAM MEMBERS FIXED TO SAID SHAFT, AND A PLURALITY OF TRANSFER MEMBERS ACTUABLE BY SAID CAM MEMBERS; THE CAM MEMBERS BEING SO ADAPTED AND CONSTRUCTED THAT IN THE COURSE OF A COMPLETE REVOLUTION OF SAID SHAFT THE FIRST MEMBER CAUSES THE CHUCK TO BE CLAMPED TO THE BAR REMNANT, THE SECOND MEMBER OPERATIVELY ENGAGES A LEVER BELONGING TO SAID TRANSFER MEMBERS WITH THE PLUNGER, AND THE THIRD CAM MEMBER BY MEANS OF THIS LEVER WITHDRAWS THE PLUNGER TO DISENGAGE THE COLLET THEREOF FROM THE RETAINED BAR REMNANT, THE FIRST CAM MEMBER CAUSES DISENGAGEMENT OF THE CHUCK FROM THE BAR REMNANT AND THEN A RENEWED CLAMPING ENGAGEMENT OF THE CHUCK ON A FRESHLY INTRODUCED BAR, THE THIRD CAM MEMBER ADVANCES THE PLUNGER TO SET UP THE COLLET THEREOF ON THE REAR END OF THE FRESH BAR, AND FINALLY THE THIRD CAM MEMBER SEPARATES SAID LEVER FROM THE PLUNGER AND ALSO THE FIRST CAM MEMBER DISENGAGES THE CHUCK FROM SAID BAR.