Abstract: In a window attaching framework in a building, upper and lower windows are foldably connected together, and one or a plurality of dampers or arms are installed between at least either the upper window or the lower window and the window attaching framework. Such dampers or arms prevents the windows from rapidly moving downward when opened, making it possible to effect smooth opening and closing of the windows.

Abstract: An upper window and a lower window are bendably connected together within a window attaching framework of a building. The upper end of the upper frame is disconnectable from the lateral frames of the window attaching framework. When the upper window is disconnected from the lateral frames, the window openings increase. Thus, the window openings are suitable for use as emergency escape openings and improve ventilation efficiency.

Abstract: A semiautomatic sliding door device comprising a sliding door, an outer framework slidably supporting the door for movement between the positions of `open` and `closed` and a driving device comprising a tension spring energizing the sliding door toward the `closed` position, a connecting wire, and a guide wheel for guiding the wire. This device is equipped with a braking device comprising permanent magnets on the outer framework and a braking plate made of copper or aluminum sheets on the sliding door. Coiling said wire around the block in proper manner, the length of elongation of the tension spring can be reduced relative to the stroke of the sliding door.