Method and device for securing windows doors etc. against burglary

摘要

If an intruder endeavours to push up the slats (10) of the roller shutter, the movement-sensitive detector (4) signals the movement of the slats to the alarm control unit (9). When the roller shutters are drawn up, the detector (5) monitors the front of the window with its field of vision. The field of vision is oriented parallel to the front of the window. Infrared movement alarms are used as detectors (4, 5). The detector (4) is in operation when the roller shutters are lowered and the detector (5) when the roller shutters are raised. Switching between the two detectors can take place automatically. IMAGE