Twist drill sharpener

Claim 1

APPARATUS FOR SUPPORTING A TWIST DRILL FOR GRINDING BY A GRINDING WHEEL MOUNTED FOR ROTATION ON A PREDETERMINED AXIS COMPRISING A BASE MOUNTED FOR LATERAL BODILY SHIFTING MOVEMENT TOWARD AND AWAY FROM THE PERIPHERY OF SAID WHEEL IN A PLANE SUBSTANTIALLY PARALLEL WITH THE AXIS OF SAID WHEEL, A SUPPORT MEMBER MOUNTED ON SAID BASE FOR PIVOTAL MOVEMENT ABOUT AN AXIS FIXED WITH RESPECT TO THE SUPPORT MEMBER, SAID AXIS BEING PARALLEL WITH THE AXIS OF SAID AND AT SUBSTANTIALLY THE SAME ELEVATION AS THE AXIS OF SAID WHEEL, AN ARM CARRIED BY SAID SUPPORT MEMBER, SAID ARM BEING SWINGABLE ABOUT AN AXIS ESSENTIALLY NORMAL TO THE PIVOTAL AXIS OF SAID SUPPORT MEMBER, A CHUCK ADAPTED TO RELEASABLY CARRY A TWIST DRILL COAXIALLY THEREOF, A FIRST COLLAR RIGID WITH SAIS ARM FOR SUPPORTING SAID CHUCK FOR RATATION ABOUT AN AXIS PARRALLEL TO SAID ARM AND FOR MOVEMENT EXIALLY OF SAID ARM WITH RESPECT TO SAID FIRST COLLAR, MEANS FOR CLAMPING SAID CHUCK IN SAID FIRST COLLAR IN PREDETERMINED AXIAL AND ROTATED POSITION TO POSITION SAID DRILL TO BE GROUND BY SAID WHEEL WHEN SAID CHUCK, ARM AND SUPPORT MEMBER ARE SWUNG ABOUT THE PIVOTAL AXIS OF THE LATTER, A SECOND COLLAR CARRIED SOLELY BY SAID CHUCK FOR FREE ROTATION AND AXIAL MOVEMENT ON SAID CHUCK, MEANS FOR CLAMPING SAID SECOND COLLAR IN PREDETERMINED ADJUSTED POSITION ON SAID CHUCK, AND COOPERATING MEANS ON SAID FIRST AND SECOND COLLARS TO PERMIT SAID CHUCK TO BE ROTATED WITHIN SAID FIRST COLLAR TO PREDETERMINED ANGULARLY RELATED POSITION, 180* APART.