Frame constructions and parts and methods for making the same or the like

Claim 1

IN COMBINATION, A PAIR OF HOLLOW FRAME MEMBERS RESPECTIVELY HAVING MITERED ENDS ADJACENT EACH OTHER, EACH FRAME MEMBER COMPRISING A CHANNEL PORTION HAVING PARALLEL SIDE WALLS, A LOCKING MEMBER HAVING A PAIR OF LEGS RESPECTIVELY DISPOSED IN THE CHANNEL PORTIONS OF SAID FRAME MEMBERS, EACH LEG HAVING AN INNER AND OUTER SIDE, SAID INNER SIDE OF EACH LEG HAVING A TAPERING SURFACE INTERRUPTED BY A PLURALITY OF LONGITUDINALLY SPACED NOTCHES; AND A PAIR OF WEDGING MEMBERS RESPECTIVELY DISPOSED IN THE CHANNEL PORTIONS OF SAID FRAME MEMBERS, EACH WEDGING MEMBER HAVING AN INNER OUTER SIDE, SAID INNER SIDE OF EACH OF SAID WEDGING MEMBERS HAVING A TAPERING SURFACE DISPOSED IN FRICTIONAL CONTACT WITH THE CORRESPONDING TAPERING SURFACE OF A RESPECTIVE ONE OF SAID LEGS, SAID TAPERING SURFACES OF SAID WEDGING MEMBERS HAVING LONGITUDINALLY SPACED NOTCHES PROVIDED THEREIN SPACED FROM EACH OTHER A DISTANCE GREATER THAN THE DISTANCE BETWEEN ADJACENT NOTCHES ON THE CORRESPONDING TAPERING SURFACES OF RESPECTIVE LEGS OF SAID LOCKING MEMBER, A SUCCEEDING NOTCH ON THE TAPERING SURFACE OF A WEDGING MEMBER BEING OUT OF LONGITUDINAL ALIGNMENT PAIR OF IMMEDIATELY TUDINALLY ADJACENT NOTCH ON THE TAPERING SURFACE OF A RESPECTIVE LEG WHEN A CORRESPONDING PAIR OF IMMEDIATELY PRECEDING NOTCHES IS IN LONGITUDINAL ALIGNMENT, AND SAID CHANNEL PORTION OF SAID FRAME MEMBERS OPENING OVER SAID NOTCHES SO THAT SUCCEEDING LONGITUDINALLY ADJACENT NOTCHES MAY BE BROUGHT INTO LONGITUDINAL ALIGNMENT AND THEREBY FORCE THE OUTER SIDES OF THE RESPECTIVE WEDGING MEMBERS AND LEGS OF SAID LOCKING MEMBER TIGHTLY AGAINST THE SIDE WALLS OF SAID CHANNEL PORTION OF SAID FRAME MEMBERS.