Abstract: This peripheral member is for use in a frame holding one or more window panes and in a framework for attachment along the inside of a window opening in a building structure. It has a hollow rectangular main body and a narrower rectangular extension. The main body and the extension form a right-angled inside corner where their adjoining sides present intersecting longitudinal recesses. These sides of the main body and the extension have longitudinal grooves located away from the inside corner. The remaining faces of the main body and the extension are flat, including a face on the extension that is a co-planar continuation of a corresponding face on the main body.

Abstract: This is a window assembly with one sliding window, one fixed window and a rectangular framework made up of extruded framework members with the same cross-sectional profile except for small segments that are removed in the framework members along which the sliding windows slide. Three of these framework members support the fixed window pane along three edges. The sliding window has extruded peripheral members along its edges which have the same cross-sectional profile as one another except where small segments are removed in two of them to slidably interfit with the two framework members along which the sliding window slides. An additional peripheral member of this cross-section is part of the framework and supports the fixed window along its remaining edge. Springs inside the two framework members along which the sliding windows slide urge the sliding window to an open position.

Abstract: One-piece member with a cam-shaped periphery serves as both a slide and a tilt-lock for a window sash which is slidable vertically in a window frame and is tiltable with respect to the window frame. A thin, flat, elongated spring leaf has its lower end attached to the combined slide and tilt-lock member and has a spirally wound upper end fastened to the window frame. The window frame conceals and protects the unwound length of this spring.