Automatic closure piece for window, door, flap or blind mounted in frame

摘要

A pull cable (6), operated by a drive mechanism (7), is positioned between the window (1) and the frame (4). A spring is tensioned when the window is opened and operates the pulley. A locking device (5) joins the window and frame when shut and is unlocked by a control (8) when the window is opened intentionally. The drive mechanism on the window has a shaft co-operating with the pulley and driven by the spring. After the window has automatically shut, the locking device automatically re-locks the window on the frame.