Abstract: A window includes a hollow extruded sash and a hollow extruded frame. The arrangement includes a pair of sashes which may slide up and down to permit opening the window and which may pivot horizontally to facilitate cleaning the window. In addition to the locking means generally provided at the top wall of the lower sash, locking means are provided along the side walls to provide additional stability for the arrangement while maintaining a tighter seal. The side walls include slots into which open-faced housings are snapped for receiving the locking members.

Abstract: An alarm system has its components completely concealed in the extruded framework of a window or door for actuation by a magnet mounted in a moving member with the alarm switch being a magnetically biased proximity sensor.Latching means are provided for maintaining the switch contacts closed after being initially closed by the actuating member. The system may include a ferrous shield for insertion between the framework and window to disable the alarm system so that the window may be moved by authorized personnel.

Abstract: Different sections of frames for windows and the like are made from identical plastic resin tubular bodies which are extruded with a plurality of appendages and shapes each of which serves a specific function in accordance with the intended use thereof, and with the appendages inapplicable to that use being removed therefrom.