Alarm for a roll shutter assembly

Details Alarm for a roll shutter assembly Alarm for a roll shutter assembly

1999-05-12

2000-04-25

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

3405451, 3405458, 340550, 340665, G08B 1302

Patent

active

060549211

ABSTRACT:
An alarmed roll shutter assembly includes a frame, a shutter that moves along the frame from a closed position to an open position, a pressure actuated sensor disposed in close proximity to the shutter and an alarm that detects actuation of the pressure actuated sensor to sound an alarm and/or turn on lights. The pressure actuated sensor may be disposed between the frame and the shutter when the shutter is in a closed position and is mounted to detect pressure caused by the shutter being forced against the frame at high pressure, such as pressure caused by placing a crowbar or other tool between the shutter and the frame and prying the shutter and frame apart.

REFERENCES:
patent: 3462885 (1969-08-01), Miller
patent: 4115952 (1978-09-01), French
patent: 4143367 (1979-03-01), Schestag
patent: 4262176 (1981-04-01), Kapitza et al.
patent: 5438798 (1995-08-01), Plamper et al.
patent: 5894267 (1999-04-01), Blair

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