Method and apparatus for chamfering toothed machine elements

Claim 1

IN A MACHINE FOR CHAMFERING END EDGES OF TEETH OF A WORKPIECE GEAR, SAID MACHINE COMPRISING A SPINDLE ADAPTED TO RECEIVE THE WORKPIECE GEAR LEAVING IT TEETH EXPOSED FOR CHAMFERING AT BOTH OF ITS END FACES AND TO LOCATE SAID GEAR AXIALLY, A LOCATING MEMBER ADAPTED TO ENGAGE AT LEAST ONE TOOTH OF THE WORKPIECE GEAR WHEN MOVED IN A POSITION OF CONTACT THEREWITH AND TO LOCATE SAID WORKPIECE GEAR ON SAID SPINDLE ANGULARLY, MEANS TO LOCK THE WORKPIECE GEAR ON THE SPINDLE IN THE LOCATED POSITION, MEANS TO MOVE SAID LOCATING MEMBER OUT OF CONTACT WITH THE GEAR, TWO SWINGING CUTTERS DISPOSED ONE AT EACH OF THE TWO END FACES OF THE WORKPIECE GEAR IN SIMILAR SPACE RELATION TO THE RESPECTIVE FACES OF THE WORKPIECE GEAR, EACH OF SAID CUTTERS ADAPTED TO CHAMFER TWO NEAR SIDE EDGES AND AT LEAST A PORTION OF EACH OF THE ADJACENT RESPECTIVE ROOT EDGES OF TWO SPACED TEETH SEPARATED BY AT LEAST ONE FULL TOOTH, CAM-AND-FOLLOWER MEANS, ONE FOR EACH OF SAID CUTTERS ADAPTED TO ACTUATE THE SAME THROUGH SIMILAR RECIPROCATING PATHS TO PRODUCE SUCCESSIVE CHAMFERING AND RETURN STROKES, AND MEANS TO INDEX THE SPINDLE ONE TOOTH AT A TIME UNTIL COMPLETION OF CHAMFERING OF ALL TEETH ON BOTH END FACES OF THE WORKPIECE GEAR.