Combination centering and facing tool

Claim 1

A COMBINED CENTERING AND FACING TOOL, COMPRISING A ROTATABLE TOOL HOLDER HAVING AN AXIALLY FORWARDLY EXPOSED RECESS PROVIDING A CUTTER RECEIVING SEAT, A FACING CUTTER, MEANS TO RIGIDLY BUT RELEASABLY CLAMP SAID FACING CUTTER ON SAID SEAT TO PRESENT A CUTTING EDGE OF SAID CUTTER TO FOLLOW A CUTTING PLANE FORWARDLY AND APPROXIMATELY DIAMETRAL OF THE HOLDER, SAID HOLDER BEING PROVIDED WITH AN AXIAL BORE OPENING FORWARDLY THEREOF AND RADIALLY INWARDLY INTERSECTED BY SAID SEAT RECESS, AN EDGE PORTION OF THE CUTTER ON SAID SEAT EXTENDING RADIALLY INWARDLY OF SAID BORE, A DRILL RECEIVED IN SAID BORE FOR AXIAL ADJUSTMENT THEREIN, SAID DRILL HAVING AN AXIALLY EXTENDING SLOT RECEIVING SAID CUTTER EDGE PORTION, WHICH SLOT IS AT LEAST IN PART DEFINED BY A RADIAL SIDE WALL GENERALLY PARALLELING THE AXIS OF THE DRILL AND A BOTTOM WALL SUBSTANTIALLY NORMAL TO SAID SIDE WALL, SAID FACING CUTTER RADIALLY INWARDLY OVERLAPPING SAID RADIAL SIDE WALL AND BEING RADIALLY SPACED OUTWARDLY OF SAID BOTTOM WALL, SAID DRILL HAVING A GENERALLY CONICAL FORWARD CUTTING PORTION RADIALLY OUTWARDLY INTERSECTING AT AN ACUTE ANGLE SAID FORWARD CUTTING EDGE OF SAID CUTTER AND ADAPTED TO FORM A RECESS CORRESPONDINGLY INTERSECTING SAID CUTTING PLANE RADIALLY, AND MENS FOR AXIALLY ADJUSTING SAID DRILL IN SAID BORE TO VARY THE POINT OF INTERSECTION OF SAID DRILL CUTTING PORTION AND SAID CUTTING EDGE.