Key operated buckle clamp

Claim 1

IN COMBINATION, A KEY-RELEASING BUCKLE CLAMP FOR A RESTRAINT BELT, AND A KEY, COMPRISING: (A) A BUCKLE FRAME HAVING A PIVOT BAR, A LOCKING BAR AND A CENTER BAR, (B) A LOCKING PLATE HAVING A PIVOT END ENGAGED IN PIVOTABLE RELATION WITH SAID PIVOT BAR AND A LOCKING END WITH LOCKING MEANS ADAPTED TO ENGAGE SAID LOCKING BAR IN LOCKED RELATION, (C) SAID LOCKING PLATE HAVING A CUTOUT SECTION IN SAID LOCKING END TO DEFINE WITH SAID LOCKING BAR A KEYHOLE, (D) SAID KEY HAVING A SUBSTANTIALLY FLAT BODY WITH AN UNLOCKING END, (E) SAID UNLOCKING END COMPRISING A SUBSTANTIALLY PERPENDICULAR PROJECTION OF SAID BODY AND A LUG WHICH EXTENDS FROM APPROXIMATELY THE MIDDLE OF THE OUTER EDGE OF SAID PROTECTION BENEATH SAID BODY AND IN SUBSTANTIALLY PARALLEL RELATION THERETO. (F) SAID LUG BEING INSERTABLE IN SAID KEYHOLE FROM THE UNDERSIDE OF SAID LOCKING PLATE TO SLIP AROUND SAID LOCKING BAR, (G) THE OUTER EDGE OF SAID PROJECTION ADJACENT SAID LUG BEING ADAPTED TO CONTACT THE UNDERSIDE OF SAID LOCKING PLATE WHEN SAID KEY IS THUS INSERTED IN SAID KEYHOLE AND SAID LOCKING MEANS IS ENGAGED WITH SAID LOCKING BAR IN LOCKED RELATION, WHEREBY THE ROTATION OF SAID KEY IN SUCH DIRECTION TO FORCE SAID OUTER EDGE OF SAID PROJECTION AGAINST THE UNDERSIDE OF SAID LOCKING PLATE DISENGAGES SAID LOCKING MEANS FROM SAID LOCKING BAR.