Work feed for saws

Claim 1

IN COMBINATION, A SAW MACHINE INCLUDING A WORK SUPPORTING TABLE HAVING A SAW BLADE RECEIVING OPENING THEREIN AND MEANS FOR DRIVING A SAW BLADE DOWNWARDLY THROUGH SAID OPENING, A WORK-UNIT DRIVING AND GUIDING ROLLER CARRIED BY THE MACHINE FOR ROTATION ABOUT AN AXIS PASSING THROUGH THE CUTTING EDGE OF THE SAW ABOVE AND GENERALLY PARALLEL TO THE PLANE OF THE WORK SUPPORTING TABLE AND SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF THE SAW, THE PERIPHERY OF SAID ROLLER HAVING A CIRCUMFERENTIAL GROOVE GENERALLY CONCAVE IN CROSS SECTION AND DISPOSED IN A PLANE SUBSTANTIALLY PARALLEL TO THE PLANE OF THE SAW, AND A WORK UNIT INCLUDING A WORKPIECE AND A PATTERN PIECE SECURED TO THE UPPER SURFACE THEREOF,SA ID WORK UNIT BEING SLIDABLY SUPPORTED UPON THE WORK TABLE, SAID PATTERN PIECE INCLUDING AN UPWARDLY DIRECTED CONTOURED PERIPHERAL RIB MEMBER HAVING A FREE UPPER EDGE PORTIN RECEIVED WITHIN THE GROOVE IN SAID ROLLER AND POSITIONED TO BE OPERATIVELY ENGAGED BY SAID GROOVED ROLLER, SAID RIB MEMBER HAVING A CROSS SECTIONAL CONFIGURATION DEFINING PLURAL ROLER ENGAGING AREAS FLYING RESPECTIVELY ON OPPOSITE SIDES OF A VERTICAL PLANE PASSING CENTRALLY THROUGH SAID RIB PERPENDICULAR TO THE AXIS OF THE ROLLER WHEREBY TO SHIFT THE WORK UNIT ON THE WORK TABLE ABOUT AN AXIS PARALLEL TO THE CUTTING EDGE OF THE SAW.