Tool holder for metal turning machines

Claim 1

A TOOL HOLDER FOR USE WITH A METAL TURNING MACHINE SO AS TO AVOID WITHDRAWAL MARKS BY THE TOOL ON THE FINISHED WORK OF THE MACHINE, WHEREIN THE WORK IS HELD FOR ROTATION ABOUT AN AXIS SPACED FROM A PLANAR SUPPORT DEFINED ON THE MACHINE, AND THE TOOL IS ADAPTED TO ENGAGE THE WORK ALONG A LINE THAT LIES IN A CUTTING PLANE WHICH IS PERPENDICULAR TO THE PLANAR SUPPORT; SAID TOOL HOLDER COMPRISING, IN COMBINATION: A SUPPORT MEMBER ADAPTED TO BE SUPPORTED ON THE PLANAR SUPPORT AND PROVIDING A PLANAR GUIDE SURFACE WHICH IS DISPOSED AT AN INCLINE TOWARD SAID CUTTING PLANE AS THE GUIDE SURFACE EXTENDS IN A DIRECTION FROM SAID PLANAR SUPPORT TOWARD SAID WORK, TOOL CARRYING MEANS MOUNTED UPON SAID SUPPORT MEMBER FOR SLIDING MOVEMENT ALONG SAID PLANAR GUIDE SURFACE, COOPERATING CAM MEANS BETWEEN SAID SUPPORT MEMBER AND SAID TOOL CARRYING MEANS FOR EFFECTING SELECTIVE MOVEMENT OF SAID TOOL CARRYING MEANS IN ONLY OPPOSITE DIRECTIONS ALONG SAID PLANAR GUIDE SURFACE, SO AS TO MOVE THE TOOL ENGAGING MEANS IN ONE DIRECTION INWARDLY AND TOWARD THE SAID CUTTING PLANE AND IN AN OPPOSITE DIRECTION OUTWARDLY AND AWAY FROM SAID CUTTING PLANE.