Automatic controls for machine tools

Claim 1

IN A SEMI-AUTOMATIC MACHINE HAVING A RELATIVELY STATIONARY PART AND SPINDLE MEANS ROTATABLY SUPPORTED THEREIN AN AUTOMATIC CHUCKING FIXTURE ADAPTED TO BE SECURED TO SAID SPINDLE MEANS COMPRISING MOVABLE WORKPIECE SUPPORTING MEANS ADAPTED TO SUPPORT THEREON THE WORK-PIECE TO BE MACHINED IN A NUMBER OF DIFFERENT PREDETERMINED POSITIONS THEREOF, INDEXING MEANS OPERATIVELY CONNECTED WITH SAID WORK-PIECE SUPPORTING MEANS TO INDEX THE SAME IN SAID PREDETERMINED POSITIONS INCLUDING AN INDEXING DISK, CLAMPING MEANS INCLUDING A SLIDING MEMBER OPERATIVE TO SELECTIVELY CLAMP SAID WORKPIECE SUPPORTING MEANS DURING MACHINING OF THE WORK-PIECE OR TO RELEASE SAID WORK-PIECE SUPPORTING MEANS DURING MOVEMENT FROM ONE OF SAID PREDETERMINED POSITIONS TO THE NEXT, TUBULAR WORK-PIECE ADVANCING MEANS OPERATIVELY CONNECTED WITH ONE OF SAID INDEXING MEANS AND SAID WORK-PIECE SUPPORTING MEANS TO SELECTIVELY ACTUATE THE SAME, TUBULAR LOCKING MEANS OPERATIVELY CONNECTED WITH SAID CLAMPING MEANS TO SELECTIVELY ACTUATE THE SAME, AND THRUST BOLT MEANS AND THRUST PIN MEANS FOR TIGHTENING SAID INDEX DISK IN THE LOCKING POSITION THEREOF.