Structure of machine tools and the like

Claim 1

IN A MACHINE TOOL, A FRAME MEMBER HAVING TOOL FEEDING ELEMENT SUPPORTING SURFACE PORTIONS THAT ARE PLANAR AND MACHINED TRUE OVER THEIRENTIRE SURFACE AREAS, SAID FRAME MEMBER BEING A BOX GIRDER OF PARALLELEPIPEDIC SHAPE HAVING ONE EXTERIOR SIDE SURFACE MACHINE TRUE AND CONTAINING THE ENTIRE AREA DEFINED BY THE TOTAL OF SAID FRAME SUPPORTING SURFACE PORTIONS IN A SINGLE PLANE, AND TOOL FEEDING ELEMENTS COMPRISING A CARRIAGE, MEANS FOR GUIDING SAID CARRIAGE IN ITS RECIPROCATING MOVEMENTS AND CONSTITUED OF A PLURALITY OF SEPARATE ELEMENTS HAVING PLANAR SURFACES SEATED ON THE PLANAR SUPPORTING SURFACE PORTIONS OF SAID FRAME MEMBER, AND FASTENING MEANS FOR SELECTIVELY AND DETACHABLY SECURING EACH OF SAID SEPARATE GUIDE ELEMENTS UPON SAID SUPPORTING SURFACE PORTIONS AT ONE OF A NUMBER OF GIVEN LOCATIONS, SAID FASTENING MEANS COMPRISING A FIRST GIVEN NUMBER OF FASTENING ELEMENTS PROVIDED ON EACH GUIDE ELEMENT, A SECOND GIVEN LARGER NUMBER OF FASTENING ELEMENTS PROVIDED ON SAID FRAME MEMBER WITHIN THE AREA DEFINED BY THE TOTAL OF SAID FRAME SUPPORTING SURFACE PORTIONS, AND FASTENING ELEMENTS SELECTIVELY ENGAGING SAID FIRST AND SECOND FASTENING ELEMENTS TO SECURE EACH GUIDE ELEMENT IN A GIVEN LOCATION ON SAID FRAME MEMBER.