| 摘要 |
Arrangements according to a first group of embodiments provide a door and frame assembly or a window and window frame assembly fitted in at least one region between an edge of the door and a co-operating edge of the door frame or an edge of the window and a co-operating edge of its corresponding window frame with attempted intrusive device insertion warning means comprising a pressure sensitive component responsive to pressure applied thereto by insertion of an intrusive device by closing an electrical circuit which includes an alarm or other alert indicative of the intrusive device insertion event. Arrangements according to a second group of embodiments provide a door and frame assembly or window and window frame assembly, wherein at least one edge of said door or frame or said window or frame is fitted with attempted intrusive device warning means comprising a pair of oppositely located and normally spaced apart elongate members, at least in part the opposing faces of said members being electrically conductive along their length, said opposing faces being capable of temporary mutual contact upon insertion of an intrusive device between said door and said door frame or window and window frame assembly in the region of said warning means, said temporary contact being sufficient to create electrical contact between said opposing faces that actuates an alarm or other alert indicative of an attempted intrusive device insertion. |
