Abstract: A hinge lock mechanism (a joint fastener) for lockingly joining at least two panels together at any angle comprising two arms. One of the arms has threads thereon and screws into a floating nut that is located in one of the panels and the other arm has a conical V shaped depression thereon that communicates with a clamping device that has a set screw thereon that is urged against the conical V shaped surface of the arm for tightening the panels together. This hinge lock mechanism forms a continuous edge at the junction of the two panels and cannot be seen from the desired side of the panels.

Abstract: A hinge lock mechanism for lockingly joining two panels together at any angle comprising top and bottom arms with a slanted flat surface thereon. These arms are secured into the panels by clamping means that has a set screw therein that is urged against the slanted flat surface of the arms. This hinge lock mechanism forms a continuous edge at the junction of the two panels and cannot be seen from the desired side of the panels.