| 摘要 |
<p>An open/closed detector for a window, where a switch function is achieved by opening/closing an electric circuit when the window is opened/closed. In the electric circuit are included elements which normally are parts of a window, namely hinges (3), casing latch point (5) and latch assembly (4). Metallic screws (7) form connections between an alarm central and the switch function of the detector via metal in window casing (1) and frame (2). One may favourably utilize already built-in steel reinforcements in the casing (1) and the frame (2). In the frame (2), possibly the latch assembly (4) itself may be utilized as the conductive metal.</p> |
