Cut-off tool and holder assembly

Claim 1

A CUT-OFF TOOL AND MOUNTING ASSEMBLY ADAPTED TO BE DETACAHABLY CLAMPED AS A UNIT TO THE CROSS SLIDE OF A MACHINE TOOL, SAID ASSEMBLY COMPRISING, A MAIN BODY HAVING A TRANSVERSE RIB ACROSS THE LOWER EDGE THEREOF SIZED TO FIT SNUGLY IN THE INLET OF A T-SLOT OF A MACHINE TOOL CROSS SLIDE, MEANS CARRIED BY SAID MAIN BODY MOUNTED IN A VERTICAL OPENING THROUGH SAID RIB AND OPERABLE TO CLAMP SAID MAIN BODY RIGIDLY TO A SUPPORT THEREFOR, A WIDE SHALLOW GROOVE OPENING THROUGH ONE SIDE FACE OF SAID MAIN BODY CLOSELY ADJACENT ONE END THEREOF AND EXTENDING AT AN ACUTE ANGLE TO THE VERTICAL, A THIN WIDE DOUBLE-EDGED CUT-OFF BLADE MOUNTED IN SAID GROOVE, CLAMPING MEANS FOR RIGIDLY ANCHORING SAID BLADE IN SAID GROOVE BY COMPRESSIVE PRESSURE ACTING TRANSVERSELY OF THE WIDTH THEREOF AND APPLIED TO THE OPPOSITE LATERAL EDGES OF SAID BLADE, SAID BLADE HAVING SHALLOW V-NOTCHES FORMED IN ITS OPPOSITE ENDS, THE LOWER FOREMOST CORNER OF SAID BLADE LYING SUBSTANTIALLY ON A HORIZONTAL PLANE COINCIDENT WITH THE AXIS OF A WORKPIECE WHEN PROPERLY ADJUSTED TO SEVER THE LATER, A RETRACTABLE SETTING GAGE FOR SAID TOOL BLADE, SAID GAGE HAVING A STEM RECIPROCABLY SUPPORTED ALONG THE END OF SAID MAIN BODY CLOSELY ADJACENT SAID TOOL MOUNTING GROOVE AND HAVING AN EXTENSION PROJECTING FROM THE LOWER END THEREOF HAVING AN UPPER SURFACE NORMAL TO THE AXIS OF SAID TOOL BLADE, SAID EXTENSION BEING MOVABLE ACROSS THE LOWER END OF THE TOOL BLADE TO ENGAGE THE LOWER FOREMOST CORNER THEREOF, AND ADJUSTABLE STOP MEANS FOR PRESETTING SAID GAGE, WHEREBY SAID AGE MAY BE POSITIONED WITH ITS UPWARDLY FACING SURFACE LYING IN A GENERALLY HORIZONTAL PLANE CONTAINING THE AXIS OF THE WORKPIECE AND USED TO EXPEDITE ACCURATE POSITIONING OF SAID TOOL BLADE WHEN SERVICING, ADJUSTING AND REPLACING THE SAME.