Chain saw with sharpening means

Claim 1

IN A CHAIN SAW OF THE TYPE HAVING AN ENDLESS SAW CHAIN DRIVEN BY AN ENGINE, SAID ENGINE SUPPORTED IN A HOUSING; MEANS SUPPORTED ON THE HOUSING TO SHARPEN THE CUTTING EDGES OF THE CUTTERS ON THE SAW CHAIN IN ITS PATH OF TRAVEL DURING NORMAL ENGINE AND SAWING OPERATION, SAID MEANS TO SHARPEN COMPRISING: (A) A MEMBER SLIDABLY SUPPORTED ADJACENT SAID HOUSING; (B) A GRINDING WHEEL ON A SHAFT BEARING MOUNTED ON SAID MEMBER AND ROTABLE IN A PATH PERPENDICULAR TO THE PATH OF THE CUTTERS, (C) SAID MEMBER BEING SLIDABLY MOVABLE SO THAT SAID GRINDING WHEEL IS MOVABLE INTO AND OUT OF SHARPENING CONTACT WITH SAID CUTTING EDGES OF SAID CUTTERS, (D) SAID SHARPENING CONTACT BEING MADE ON A POINT OF ARC THROUGH WHICH EACH CUTTING EDGE PASSES; (E) MEANS ON SAID CHAIN SAW ADJACENT SAID HOUSING TO SLIDABLY MOVE SAID MEMBER SO AS TO PLACE SAID GRINDING WHEEL IN SHARPENING CONTACT WITH SAID CUTTING EDGES; (F) SPRING MEANS ON SAID LAST MEANS TO BIAS SAID GRINDING WHEEL OUT OF SHARPENING CONTACT WITH SAID CUTTING EDGES; (G) AND A DRIVING WHEEL ON SAID SHAFT DRIVEN BY CONTACT WITH MEANS ON SAID ENGINE TO ROTATE SAID GRINDING WHEEL TO SHARPEN SAID CUTTING EDGES, (H) SAID MEMBER BEING PIVOTABLE TO ADJUST SAID DRIVING WHEEL RELATIVE TO SAID LAST MEANS ON SAID ENGINE TO INSURE PROPER ROTATION OF SAID GRINDING WHEEL.