Burglar resistant window hinge - has locking protrusion under pin head, and locking pin at bottom

摘要

The door or window frame hinge includes two pivoting blades (1.2) with butts (3.4) at the facing edges. The hinge pin (5) has, underneath the head, a tapered protrusion (6) which fits in a corresponding groove in the top of the butt. A hole (9) near the bottom of the pin, and hole (8) in the bottom butt (8) are, in the closed position, alinged to receive e.g. a locking pin. In alternative arrangements the pin may be locked by a threaded sleeve at the pin bottom, or a disc fitting between a lip and the window or door edge.