Motorised sash window

摘要

A motorised sash window comprises a frame 10 and sashes 12, 14. The rear sash 14 is motorised by an assembly 50 which replaces the usual guide pulley of the window. The assembly includes an electric motor (54 in Figure 2; 64 in Figure 3) which drives the pulley by a gear chain. A motorised assembly can be provided at one or both sides of the window. The window can operate a limit switch to de-energise the motor which can be remote-controlled if desired. The motorised assembly can conveniently be post-fitted to an existing sash window.