Abstract: A window construction comprising an outer window framework having lineal sections providing a header (20H), a sill (30S), and a pair of jambs (23L, 23R), joined by formed integral corner sections (10) having joint ends which extend from the corner sections at a predetermined angle with respect to each other. The corner sections and lineal sections have complementary cross-sectional configurations, and are formed of essentially the same material so they may be welded together (FIG. 6). In another configuration these ends may have integral splines (12) as part of the complementary cross-sectional configurations (FIGS. 3, 4 & 5) and are mechanically joined. In either configuration, the joints between the corner section and the lineal sections achieve rigid water-tight corner joints and provide a water-tight window.

Abstract: A window construction applies to vertically or horizontally hung windows including horizontally sliding windows, to conventional double-hung windows wherein one or both sashes are movable, and to odd-shaped windows (hexagons, octagons, or the like). The outer window framework comprises lineal sections providing a header, a sill, and a pair of jambs, joined by formed corner sections of complementary cross-sectional configuration to achieve water-tight corner joints and a water-tight window. The outer framework incorporates flanges for mounting the complete window in a window aperture of a building or vehicle, and channels for receiving an inner framework of sashes and/or vents, and providing a peripheral seal for the same. She internal sashes may be single or multiple frames holding glass or comparable transparent or translucent panes.