Machine tool

Claim 1

A COPYING MILLING MACHINE FOR SIMULTANEOUSLY PERFORMING ROUGH AND FINISHING CUTTING OPERATIONS ON DIFFERENT PORTIONS OF THE SAME WORK PIECE, COMPRISING MEANS FOR HOLDING A WORKPIECE AND A PATTERN, MEANS FOR HOLDING A ROUGH MILLING TOOL AND A ROUGHING TRACER IN POSITIONS TO ENGAGE RESPECTIVELY WITH SAID WORKPIECE AND SAID PATTERN, SAID WORKPIECE AND PATTERN HOLDING MEANS AND SAID TOOL AND TRACER HOLDING MEANS INCLUDING MEANS MOUNTING SAID WORKPIECE AND PATTERN ON ONE HAND AND SAID TRACER AND TOOL ON THE OTHER HAND FOR MOVEMENT RELATIVE TO EACH OTHER IN THREE COORDINATE DIRECTIONS, POSITIVE FEED MEANS FOR CAUSING RELATIVE MOVEMENTS BETWEEN SAID WORKPIECE AND SAID TOOL WHILE THEY ARE ENGAGED WITH EACH OTHER AND FOR SIMULTANEOUSLY CAUSING CORRESPONDING RELATIVE MOVEMENTS BETWEEN SAID PATTERN AND SAID TRACER WHILE THEY ARE ENGAGED WITH EACH OTHER, MEANS FOR HOLDING A FINISHING CUTTING TOOL AND A FINISHING TRACER FOR MOVEMENT RELATIVE TO SAID WORKPIECE AND PATTERN IN THREE COORDINATE DIRECTIONS WHILE SAID FINISHING CUTTING TOOL AND FINISHING TRACE ARE ENGAGED RESPECTIVELY WITH THE SAME WORKPIECE AND PATTERN ENGAGED BY SAID ROUGH MILLING TOOL AND ROUGHING TRACER, MEANS FOR DRIVING SAID FINISHING CUTTING TOOL INDEPENDENTLY OF SAID ROUGH MILLING TOOL, AND HAND OPERATED MEANS FOR MOVING SAID FINISHING CUTTING TOOL AND FINISHING TRACER TOGETHER RELATIVE TO SAID WORKPIECE AND PATTERN INDEPENDENTLY OF AND SIMULTANEOUSLY WITH RELATIVE MOVEMENTS OF SAID WORKPIECE AND ROUGH MILLING TOOL WITH RESPECT TO EACH OTHER.