Truing and feeding method and apparatus for grinding machines

Claim 1

IN A GRINDING MACHINE INCLUDING A ROTATABLY MOUNTED GRINDING WHEEL HAVING A GRINDING SURFACE, A SUPPORT MEMBER, A TRUING DEVICE MOVABLE BETWEEN A REST LIMIT POSITION AT ONE SIDE OF THE GRINDING SURFACE AND A REVERSING LIMIT POSITION AT THE OPPOSITE SIDE OF THE GRINDING SURFACE, SAID TRUING DEVICE ADAPTED TO ENGAGE SAID GRINDING SURFACE DURING ACTUATION BETWEEN LIMIT POSITIONS TO TRUE THE GRINDING SURFACE AND FEED MEANS FOR EFFECTING RELATIVE MOVEMENT OF THE GRINDING WHEEL AND SUPPORT MEMBER; A CONTROL MEMBER HAVING A CIRCUMFERENTIAL CONTROL SURFACE ADAPTED TO BE ENGAGED BY THE TRUING DEVICE DURING MOVEMENT THEREOF BETWEEN LIMIT POSITIONS, SENSING MEANS COOPERABLE WITH SAID CONTROL SURFACE AND THE FEED MEANS TO SENSE THE CHANGES IN THE DIAMETER OF SAID CONTROL SURFACE EFFECTED BY THE TRUING DEVICE AND TO ACTUATE THE FEED MEANS TO CAUSE A PREDETERMINED RELATIVE MOVEMENT OF THE GRINDING WHEEL AND SUPPORT MEMBER THEREBY TO COMPENSATE FOR THE CHANGES EFFECTED BY THE TRUING DEVICE.