Abstract: An upper sash of a frame window or door assembly which is provided with projections extending below the lower rail of the upper sash, wherein the projections engage and cooperate with a notch found on the flange of the jamb of the frame assembly in a manner so as to support and restrict movement of the upper sash.

Abstract: A modification for window or door assemblies having interlocks on the sash rails where insulating material is placed between the interlock of a lower rail to an upper sash and the interlock of an upper rail to a lower sash so as to act as a thermal barrier against heat conduction through the upper sash which is exposed to exterior climate of the building in which the window or door assembly is being used.

Abstract: A method of forming a dual thermal barrier hollow wherein separate metal shapes are joined together with a non-conductive adhesive tape and a thermal barrier material is poured into receiving channels suitably formed by the joining of the two metal shapes, and upon hardening of the thermal barrier material, a dual thermal barrier hollow having structural integrity is formed.

Abstract: A dual thermal barrier hollow comprised of separate metal shapes joined together with a non-conductive adhesive tape and a thermal barrier material.

Abstract: The invention comprises a basic metal window which is so constructed as to receive an interior snap-on plastic window. Exterior metal framing members are provided with tracks or openings which can accommodate various width panels such as single-glazed panels, double-glazed panels, screen panels or other panels as desired. Interior plastic framing members are also provided with suitable tracks for receiving sashes or glass panels. When the interior plastic window is attached to an exterior metal window, an insulated or thermal barrier window construction is provided.

Abstract: A thermally insulated hinged window or door having a sash rail with a metal frame around the periphery thereof which is shielded from exposure to interior or exterior ambient temperatures by an extended overlapping frame member and seal to the glazing gasket perimeter.