Self-locking awning type metal windows

Claim 1

IN A SELF-LOCKING METAL WINDOW CONSTRUCTION INCLUDING A WINDOW FRAME, VERTICALLY ALIGNED SASH ELEMENTS, HINGE ARMS ON THE SIDES OF SAID SASH ELEMENT, HINGE PINS CARRIED BY THE HINGE ARMS POVITALLY MOUNTING SAID SASH AT THE TOP THEREOF TO SAID WINDOW FRAME, A SASH OPERATOR BAR PIVOTALLY CONNECTED TO SAID HINGE ARMS ON EACH SIDE OF SAID SASH, AND SASH OPERATOR MECHANISM INCLUDING A TORSION BAR MOUNTED ON SAID WINDOW FRAME, LEVER MEANS FIXED ON SAID TORSION BAR, AND A LINK AND PIVOT MEANS CONNECTING THE LOWER END OF EACH SAID SASH OPERATOR BAR AND SAID LEVER MEANS, AND WINDOW REGULATOR MEANS FOR TURNING SAID TORSION BAR TO OPEN AND CLOSE SAID SASH, A LOCKING BAR ON EACH SIDE OF SAID SASH HAVING VERTICALLY SPACED ELONGATED APERTURES THEREIN, PIVOT MEANS ON AND EXTENDING FROM SAID HINGE ARMS DISPOSED THROUGH SAID ELONGATED APERTURES IN SAID LOCKING BARS PIVOTALLY CONNECTING EACH SAID LOCKING BAR TO ADJACENT HINGE ARMS PERMITTING LIMITED LONGITUDINAL MOVEMENT OF SAID LOCKING BARS IN RESPECT TO SAID HINGE ARMS AT SAID PIVOT MEANS, SAID LOCKING BARS BEING SUPPORTED ON SAID PIVOT MEANS EXTENDING FROM SAID HINGE ARMS, SPRING MEANS N SAID SUPPORT PIVOT MEANS EXTENDING FROM SAID HINGE ARMS ENGAGING SAID LOCKING BARS CONSTANTLY URGING THE SAME DOWNWARDLY IN RESPECT TO SAID PIVOT MEANS, THE TURNING OF SAID TORSION BAR IN ONE DIRECTION MOVING SAID LEVER MEANS THEREON TO RAISE SAID OPERATOR BAR WHEREBY TO PROVIDE SAID SASH TO ITS CLOSED POSITION, A LOCKING ARM EXTENDING FROM EACH SAID LEVER MEANS ENGAGING EACH SAID LOCKING BAR UPON THE PIVOTING OF SAID SASH TO ITS CLOSED POSITION, CONTINUED MOVEMENT OF SAID LEVER MEANS BY SAID WINDOW REGULATOR AFTER SAID SASH IS CLOSED CAUSING EACH SAID LOCKING ARM TO MOVE SAID LOCKING BAR INTO LOCKING ENGAGEMENT WITH SAID SASH WHEREBY TO MAINTAIN SAID SASH IN ITS CLOSED POSITION, THE LINK AND PIVOT MEANS BETWEEN SAID SASH OPERATOR BAR AND SAID LEVER MEANS BEING FORMED TO PROVIDE LOST MOTION LONGITUDINALLY OF SAID LINK WHEREBY TO PERMIT SAID CONTINUED MOVEMENT OF SAID LEVER MEANS.