Metal window sash

Claim 1

A WINDOW SASH FOR HOLDING SEALING GASKET STRIPS AGAINST THE OPPOSITE SIDES OF A PANE OF GLASS PROJECTING INTO THE GLAZING CHASE WITH WHICH THE SASH IS PROVIDED, THE SASH COMPRISING A METAL RAIL HAVING A BODY SUBSTANTIALLY L-SHAPE IN CROSS SECTION WITH A FACE AND AN INNER SIDE MEETING AT SUBSTANTIALLY A RIGHT ANGLE, A GASKET STRIP MOUNTED ON THE FREE EDGE OF THE FACE FOR ENGAGING ONLY ONE SIDE OF THE GLASS PANE, A RIGID ONE-PIECE METAL GLAZING BEAD HAVING A FLANGE OPPOSED TO AND SUBSTANTIALLY PARALLEL TO SAID FACE AND EXTENDING FROM SAID INNER SIDE OF THE RAIL TO A POINT WHERE IT HAS A FREE EDGE, THE RAIL BEING PROVIDED WITH A LONGITUDINAL GROOVE, THE BEAD HAVING AN INTEGRAL HOOK-LIKE PORTION REMOVABLY DISPOSED IN SAID GROOVE FOR HOOKING THE BEAD ONTO THE RAIL, SAID GROOVE AND HOOK-LIKE PORTION BEING POSITIONED TO HOLD THE BEAD AGAINST STRAIGHT LINE MOVEMENT AWAY FROM THE RAIL, AND THE RAIL ALSO BEING PROVIDED WITH A PORTION NORMALLY ENGAGED BY THE GLAZING BEAD TO PREVENT SWINGING OF SAID FLANGE AWAY FROM SAID FACE OF THE RAIL AS LONG AS THE BEAD EXTENDS INTO SAID GROOVE, AND A SECOND GASKET STRIP COMPRESSIBLE BETWEEN SAID FREE EDGE OF THE BEAD AND THE GLASS PANE AND NORMALLY HOLDING THE BEAD IN ENGAGEMENT WITH SAID RAIL PORTION, THE SECOND GASKET BEING REMOVABLE LATERALLY FROM THE BEAD, AND SAID BEAD FLANGE BEING MOVABLE TOWARD SAID FACE OF THE RAIL AND OUT OF SAID GROOVE IN THE ABSENCE OF SAID SECOND GASKET STRIP.