Grinding machine

Claim 2

IN A CENTERLESS GRINDING MACHINE OF THE TYPE HAVING A ROTATABLE GRINDING WHEEL AND A REGULATING WHEEL ASSEMBLY ADAPTED TO BE RECIPROCATED TOWARD AND AWAY FROM THE GRINDING WHEEL, MEANS FOR EFFECTING SUCH RECIPROCATION INCLUDING VARIABLE SPEED DRIVE MEANS, A DRIVEN SHAFT OPERATIVELY CONNECTED WITH SAID DRIVE MEANS AND ROTATABLY SUPPORTED IN THE SAID ASSEMBLY AND HAVING AN ECCENTRIC PORTION, A PITMAN PIVOTALLY CONNECTED AT ONE END TO THE ECCENTRIC PORTION OF THE SHAFT, MEANS PIVOTALLY SECURING THE OTHER END OF THE PITMAN TO DEFINE AN INITIAL POSITION FOR THE SAID ASSEMBLY WHEREBY FOR EACH ROTATION OF THE SHAFT THE ASSEMBLY WILL BE RECIPROCATED FROM ITS INITIAL POSITION TOWARD AND AWAY FROM THE GRINDING WHEEL, A CAM SECURED TO SAID SHAFT FOR ROTATION THEREWITH, AND MEANS ENGAGEABLE BY SAID CAM AND OPERABLE THEREBY TO CHANGE THE SPEED OF SAID DRIVE MEANS AND THUS TO ALTER THE RATE OF MOVEMENT OF THE SAID ASSEMBLY DURING EACH RECIPROCATION THEREOF.

Claim 3

A CENTERLESS GRINDER HAVING A GRINDING WHEEL ROTATABLE ON A LONGITUDINAL AXIS, A GRINDING WHEEL DRESSER ASSEMBLY MOVABLE TRANSVERSELY TOWARD THE GRINDING WHEEL FROM ONE SIDE OF ITS AXIS TO EFFECT A DRESSING OF THE GRINDING WHEEL, A REGULATING WHEEL ASSEMBLY INCLUDING A ROTATABLE REGULATING WHEEL AND WHICH IS MOVABLE TRANSVERSELY TOWARD THE GRINDING WHEEL FROM THE OTHER SIDE OF ITS AXIS TO MAINTAIN A DESIRED SPACED RELATIONSHIP THEREWITH FOR GRINDING OPERATIONS, MEANS FOR MOVING EACH OF SAID ASSEMBLIES EACH OF WHICH MEANS INCLUDES A ROTATABLE SHAFT HAVING A GEAR ROTATABLY MOUNTED THEREON AND HAVING MEANS EFFECTING A DRIVING CONNECTION TO CAUSE SIMILAR ROTATION OF THE SHAFT WHEN ITS GEAR IS ROTATED IN ONE DIRECTION, A RACK ENGAGING BOTH OF SAID GEARS, AND DRIVE MEANS FOR RECIPROCATING SAID RACK WHEREBY TO MOVE BOTH OF SAID ASSEMBLIES TOWARD SAID GRINDING WHEEL DURING EACH RECIPROCATION OF SAID RACK TO RESPECTIVELY DRESS THE GRINDING WHEEL AND RE-POSITION THE REGULATING WHEEL ASSEMBLY TO COMPENSATE FOR THE REDUCED DIAMETER OF THE DRESSED WHEEL.

Claim 4

A CENTERLESS GRINDER HAVING A GRINDING WHEEL ROTATABLE ON A LONGITUDINAL AXIS, A GRINDING WHEEL DRESSER ASSEMBLY MOVABLE TRANSVERSELY TOWARD THE GRINDING WHEEL FROM ONE SIDE OF ITS AXIS TO EFFECT A DRESSING OF THE GRINDING WHEEL, A REGULATING WHEEL ASSEMBLY INCLUDING A ROTATABLE REGULATING WHEEL AND WHICH IS MOVABLE TRANSVERSELY TOWARD THE GRINDING WHEEL FROM THE OTHER SIDE OF ITS AXIS TO MAINTAIN A DESIRED SPACED RELATIONSHIP THEREWITH FOR GRINDING OPERATIONS, MEANS FOR MOVING EACH OF SAID ASSEMBLIES EACH OF WHICH MEANS INCLUDES A ROTATABLE SHAFT HAVING A GEAR ROTATABLY MOUNTED THEREON AND HAVING MEANS EFFECTING A DRIVING CONNECTION TO CAUSE SIMILAR ROTATION OF THE SHAFT WHEN ITS GEAR IS ROTATED IN ONE DIRECTION, A RACK ENGAGING BOTH OF SAID GEARS, AND DRIVE MEANS FOR RECIPROCATING SAID RACK WHEREBY TO MOVE BOTH OF SAID ASSEMBLIES TOWARD SAID GRINDING WHEEL DURING EACH RECIPROCATION OF SAID RACK TO RESPECTIVELY DRESS THE GRINDING WHEEL AND RE-POSITION THE REGULATING WHEEL ASSEMBLY TO COMPENSATE FOR THE REDUCED DIAMETER OF THE DRESSED WHEEL.