| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a device for generating a signal for issuing an alarm to a resident even if a load is given to any part of a rail for previously preventing an invader from invading into a room by getting over the rail installed at the window of a building. SOLUTION: In a fitting bracket for window rail, a pressure sensor 6 is installed between the stopper 4 of a window rail 1 and a fitting bracket for window frame 3, a load is detected as pressure when the load is given to the rail 1 and an electric signal closing an incorporated switch circuit and operating an alarm installed in a room is generated. The detected load is variable and the load of a flower pot which is permanently installed on the rail is not detected. The minimum load which is not sensed by the load of a bird can be set.</p> |
