Device for cutting sheet material

Claim 1

APPARATUS FOR CUTTING SHEET MATERIAL COMPRISING A TABLE HAVING A FLAT HORIZONTAL UPPER SURFACE, A PAIR OF RACKS, FRAME MEANS MOUNTING SAID RACKS IN PARALLEL RELATION TO SAID TABLE AND TO ONE ANOTHER AND WITH THE TEETH OF SAID RACKS PROJECTING UPWARDLY, A SHAFT, A ROTARY BLADE KEYED TO SAID SHAFT WITH THE OUTER CIRCUMFERENCE OF SAID BLADE IN SPACED RELATION TO SAID TABLE, ROLERS FIXED TO THE OPPOSITE ENDS OF SAID SHAFT, PINION GEARS FIXED ADJACENT THE OPPOSITE ENDS OF SAID SHAFT AND MESHINGLY ENGAGING SAID RACKS, SAID FRAME MEANS INCLUDING A PAIR OF CHANNELS OPENING TOWARD ONE ANOTHER, THE UPPER LEGS OF SAID CHANNELS DEFINING RESPECTIVE GUIDE ELEMENTS PROJECTING TOWARD ONE ANOTHER AND IN SPACED PARALLELISM WITH SAID RACKS, A FIRST BEVEL GEAR SECURED TO SAID SHAFT AND HAVING TWO TOOTHED SURFACES BEVELED AT EQUAL BUT OPPOSITE ANGLES RELATIVE TO THE AXIS OF SAID SHAFT, AN INVERTED U-SHAPED FRAME HAVING ITS LEGS JOURNALLED ON SAID SHAFT, A PAIR OF ELONGATED GUIDE MEMBERS EACH HAVING A RECESS EXTENDING LONGITUDINALY THEREOF AND SLIDABLY RECEIVING ONE OF SAID RESPECTIVE GUIDE ELEMENTS, SAID GUIDE MEMBERS BEING FIXED TO SAID U-SHAPED FRAME TO MAINTAIN IT AT A FIXED ATTITUDE RELATIVE TO SAID TABLE, A MOTOR MOUNTED ON THE BASE OF SAID U-SHAPED FRAME WITH THE DRIVE SHAFT OF SAID MOTOR PROJECTIN DOWNWARDLY, A SECOND BEVEL GEAR MOUNTED ON THE DISTAL END OF SAID DRIVE SHAFT IN MESHING ENGAGEMENT WITH ONE OF SAID TWO TOOTHED SURFACES, SAID MOTOR BEING ADJUSTABLE ON SAID BASE TO A NEW POSITION WHEREIN SAID SECOND BEVEL GEAR IS IN MESHING ENGAGEMENT WITH THE OTHER OF SAID TWO TOOTHED SURFACES.