Machine tool contouring mechanism

Claim 1

IN A GRINDING MACHINE HAVING A GRINDING WHEEL, A MECHANISM FOR TRUING A CONTOUR DEFINING IN CROSS SECTION A CIRCULAR ARC OF SELECTED RADIUS ON THE PERIPHERY OF SAID WHEEL, THE MECHANISM COMPRISING A SUPPORT MEMBER, A LOWER SLIDE MOUNTED ON THE SUPPORT MEMBER FOR REVERSIBLE MOVEMENT THEREON IN ONE DIRECTION, AN UPPER SLIDE MOUNTED ON THE LOWER SLIDE FOR REVERSIBLE MOVEMENT THEREON IN A DIRECTION TRANSVERSE TO SAID ONE DIRECTION, A WHEEL FORMING TOOL OPERATIVELY CONNECTED TO THE UPPER SLIDE, AN ARM PIVOTALLY CONNECTED ON AN AXIS TO THE SUPPORT MEMBER AND SWINGABLE ABOUT SAID AXIS IN A PLANE PARALLEL TO THE PLANE OF MOVEMENT OF THE UPPER SLIDE, A PIN RECEIVED IN SAID ARM AND UPPER SLIDE TO DEFINE A PIVOTAL CONNECTION THEREBETWEEN, SAID PIN SHIFTABLE IN THE ARM AND UPPER SLIDE TO A DISTANCE EQUAL TO SAID SELECTED RADIUS FROM SAID AXIS TO DEFINE THE CIRCULAR ARC THROUGH WHICH THE UPPER SLIDE AND TOOL IS SWUNG, AND MEANS TO SHIFT THE SUPPORT MEMBER RELATIVE TO THE GRINDING WHEEL.