Pneumatically operated vise jaw construction

Claim 1

AN AIR OPERATED VISE COMPRISING A SUBSTANTIALLY ELONGATED BASE MEMBER, A FIXED JAW MEMBER SECURED ON ONE END OF SAID BASE MEMBER TO EXTEND UPWARDLY THEREFROM WITH ONE SIDE OF SAID FIXED JAW MEMBER DEFINING A VERTICAL STOCK GRIPPING SURFACE, A FIRST MEMBER AND A SECOND MEMBER, A SLOT FORMED IN SAID BASE MEMBER WITH THE LONGITUDINAL AXIS OF SAID SLOT DISPOSED LONGITUDINALLY OF SAID BASE MEMBER, CLAMPING MEANS CARRIED BETWEEN SAID FIRST MEMBER AND SAID SLOT IN SAID BASE MEMBER FOR SELECTIVELY SECURING SAID FIRST MEMBER ON THE UPPER SIDE OF SAID BASE MEMBER IN ANY SELECTED SPACED POSITION FROM SAID FIXED JAW MEMBER, SAID SECOND MEMBER COMPRISING A STOCK GRIPPING SURFACE AND A PAIR OF SIDE WALLS EXTENDING IN A PARALLEL SPACED APART RELATIONSHIP FROM SAID STOCK GRIPPING SURFACE, SAID SECOND MEMBER MOUNTED IN COOPERATION WITH SAID FIRST MEMBER WITH SAID STOCK GRIPPING SURFACE OF SAID SECOND MEMBER DISPOSED BETWEEN SAID FIRST MEMBER AND SAID STOCK GRIPPING SURFACE OF SAID FIXED JAW MEMBER AND WITH SAID PAIR OF SIDE WALLS EXTENDING ON EACH SIDE OF SAID FIRST MEMBER IN A TELESCOPING RELATIONSHIP THEREWITH, A BLADDER CARRIED BETWEEN SAID SECOND MEMBER AND SAID FIRST MEMBER, MEANS CARRIED BETWEEN SAID FIRST MEMBER AND SAID SIDE WALLS OF SAID SECOND MEMBER FOR LIMITING THE MOVEMENT OF SAID STOCK GRIPPING SURFACE OF SAID SECOND MEMBER TOWARD AND AWAY FROM SAID STOCK GRIPPING SURFACE OF SAID FIXED JAW MEMBER, AND MEANS FOR DELIVERING AIR THROUGH SAID FIRST MEMBER TO SAID BLADDER TO EXPAND SAID BLADDER TO MOVE SAID STOCK GRIPPING SURFACE OF SAID SECOND MEMBER AWAY FROM SAID FIRST MEMBER AND TOWARD SAID STOCK GRIPPING SURFACE OF SAID FIXED JAW MEMBER.