Work holding fixture for grinding half round grooves

Claim 1

A WORK HOLDING FIXTURE FOR SIMULTANEOUSLY LOCATING A PLURALITY OF WORKPIECES SO THAT AN EQUAL AMOUNT OF MATERIAL MAY BE REMOVED FROM A SURFACE OF EACH WORKPIECE, COMPRISING AN ELONGATED FRAME INCLUDING A SUBSTANTIALLY FLAT SUPPORT MEMBER, TRANSVERSELY EXTENDING VERTICAL MEMBERS SPACED APART LONGITUDINALLY OF THE SUPPORT MEMBER AND LONGITUDINALLY EXTENDING FRAME MEMBERS SECURED TO EACH OF THE TRANSVERSE MEMBERS AT EACH END THEREOF ADJACENT THE TOP THEREOF, A SEPARATE VERTICALLY EXTENDING EXPANDING MANDREL SECURED TO THE SUPPORT MEMBER BETWEEN EACH PAIR OF TRANSVERSE MEMBERS, A SEPARATE RESILIENT ANNULAR PAD SLEEVED OVER EACH OF SAID EXPANDING MANDRELS AND RESTING ON SAID SUPPORT MEMBER FOR YIELDABLY SUSTAINING SEPARATE WORKPIECES SLEEVED OVER THE INDIVIDUAL EXPANDING MANDRELS, LOCATING APPARATUS SECURED TO SAID FRAME FOR SIMULTANEOUSLY ENGAGING EACH OF SAID WORKPIECES TO ACCURATEDLY VERTICALLY POSITION THE WORKPIECES ON THE RESILIENT PADS INCLUDING A PLURALITY OF HINGE ARMS PIVOTALLY SECURED TO ONE SIDE OF SAID FRAME, A LOCATING BAR FOR SIMULTANEOUSLY ENGAGING EACH OF SAID WORKPIECES DURING LIMITED PIVOTAL MOVEMENT OF SAID HINGE ARMS EXTENDING LONGITUDINALLY OF SAID FRAME AND RIGIDLY SECURED TO EACH OF SAID HINGE ARMS WHEREBY SAID HINGE ARMS ARE CONSTRAINED TO MOVE TOGETHER AND STOPS ON THE OTHER SIDE OF SAID FRAME AND ON THE OTHER END OF SAID HINGE ARMS OPERABLE TO LIMIT PIVOTAL MOVEMENT OF SAID HINGE ARMS IN ONE DIRECTION, CLAMPS SPACED LONGITUDINALLY OF SAID FRAME AND SUPPORTED BY SAID FRAME AND ENGAGEABLE WITH SAID OTHER END OF SAID HINGE ARMS OPERABLE TO HOLD SAID STOPS IN CONTACT WITH THE HINGE ARMS IN A LIMITING POSITION THEREOF AND WITH SAID LOCATING BAR IN ENGAGEMENT WITH THE WORKPIECES, AND UNITARY CAM MEANS SECURED TO THE SUPPORT MEMBER FOR SIMULTANEOUSLY ACTUATING SAID EXPANDING MANDRELS.