Clamping arrangement

Claim 1

A CLAMPING ATTACHMENT FOR CLAMPING A WORKPIECE TO A SUPPORT COMPRISING, IN COMBINATION: (A) A LEVER MEMBER HAVING A PIVOT PORTION AND TWO ARM PORTIONS; (B) A TENSION MEMBER HAVING ONE TERMINAL PORTION PIVOTALLY FASTENED TO SAID PIVOT PORTION AND ANOTHER TERMINAL PORTION SPACED FROM SAID LEVER MEMBER IN A PREDETERMINED DIRECTION; (C) FASTENING MEANS FOR FASTENING SAID OTHER TERMINAL PORTION TO SAID SUPPORT; (D) ABUTMENT MEANS ON ONE OF SAID ARM PORTIONS AND FACING IN SAID DIRECTION; (E) A PRESSURE MEMBER ENGAGEABLE WITH THE OTHER ONE OF SAID ARM PORTIONS, SAID PRESSURE MEMBER INCLUDING (1) THREADED ADJUSTMENT MEANS FOR MOVING SAID OTHER ARM PORTION IN A DIRECTION OPPOSITE TO SAID PREDETERMINED DIRECTION WHEN SAID ADJUSTMENT MEANS ARE THREADEDLY MOVED, AND (2) A BASE MEMBER HAVING A PORTION MOUNTED ON SAID TENSION MEMBER FOR PIVOTAL MOVEMENT ABOUT AN AXIS EXTENDING IN SAID PREDETERMINED DIRECTION, AND ANOTHER PORTION RADIALLY SPACED FROM SAID AXIS, (3) SAID ADJUSTMENT MEANS BEING INTERPOSED BETWEEN SAID OTHER PORTION OF SAID BASE MEMBER AND SAID OTHER ARM PORTION WHEN THE SAME IS ENGAGED BY SAID PRESSURE MEMBER AND INCLUDING A THREADED PIN MEMBER FIXEDLY FASTENED TO SAID OTHER PORTION OF SAID BASE MEMBER, AND A NUT MEMBER THREADEDLY ENGAGING SAID PIN MEMBER, (4) SAID OTHER ARM PORTION OF SAID LEVER MEMBER BEING FORMED WITH AN APERTURE, AN END PORTION OF SAID PRESSURE MEMBER EXTENDING INTO SAID APERTURE; AND (F) STOP MEANS ON SAID PIN MEMBER FOR LIMITING THREADED MOVEMENT OF SAID NUT MEMBER ON SAID PIN MEMBER (1) SAID PIN MEMBER HAVING AN AXIS AND AN AXIAL END PORTION SPACED FROM SAID BASE MEMBER, SAID END PORTION BEING FORMED WITH AN AXIAL BORE, (2) SAID STOP MEANS INCLUDING A STOP MEMBER AXIALLY MOVABLE INWARD AND OUTWARD OF SAID BORE, AND MEANS FOR LIMITING SAID OUTWARD MOVEMENT OF SAID STOP MEMBER, SAID STOP MEMBER HAVING AN ABUTMENT FACE AXIALLY ENGAGEABLE BY SAID NUT MEMBER DURING THREADED MOVEMENT OF SAID NUT MEMBER ON SAID PIN MEMBER IN A DIRECTION AWAY FROM SAID BASE MEMBER.