Locking hinge

Claim 1

A LOCKING HINGE COMPRISING: A FIRST HINGE MEMBER HAVING A FLAT END WITH A CAVITY EXTENDING CENTRALLY INTO SAID FLAT END, SAID CAVITY EXTENDING TOWARDS AND TERMINATING SHORT OF ONE WALL OF SAID HINGE MEMBER, SAID HINGE MEMBER HAVING AN OPENING SPACED FROM SAID FLAT END THROUGH SAID SIDE INTO SAID CAVITY, SAID HINGE MEMBER HAVING TWO EARS EXTENDING OUT AND AWAY FROM SAID FLAT END ON THE SIDE THEREOF OPPOSITE TO SAID WALL, SAID EARS BEING DISPOSED ONE ON EACH SIDE OF AND AT DIFFERENT DISTANCES FROM THE CENTER OF SAID CAVITY, SAID EARS HAVING ALIGNED HOLES THERETHROUGH ON AN AXIS LYING IN THE PLANE OF SAID FLAT END; A SECOND HINGE MEMBER IDENTICAL WITH SAID FIRST HINGE MEMBER; A HINGE PIN EXTENDING THROUGH SAID EAR HOLES OF BOTH HINGE MEMBERS; A LOCK MEMBER HAVING AN ELONGATED SLOT AND A SHORT AND A LONG PRONG EXTENDING THEREFROM, SAID LOCK MEMBER BEING DISPOSED IN SAID HINGE MEMBER CAVITIES WHEN SAID HINGE MEMBERS ARE CLOSED WITH THEIR FLAT ENDS IN ABUTMENT, WITH THE HINGE PIN EXTENDING THROUGH SAID SLOT, WITH SAID LONG PRONG EXTENDING INTO AND THROUGH THE OPENING IN SAID FIRST HINGE MEMBERS AND WITH SAID SHORT PRONG EXTENDING INTO THE OPENING OF SAID SECOND HINGE MEMBER; SPRING MEANS BIASING SAID LOCK MEMBER IN A DIRECTION TO PROJECT SAID PRONGS INTO SAID OPENINGS; SAID LOCK MEMBER HAVING A CAM SURFACE THEREON ADJACENT SAID SHORT PRONG ENGAGEABLE WITH THE FLAT END OF SAID SECOND HINGE MEMBER UPON CLOSING OF SAID HINGE MEMBERS TO MOVE SAID LOCK MEMBER AGAINST THE BIAS OF SAID SPRING MEANS.