Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-05-16
1999-06-15
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
49 26, 49 27, 49 28, 340540, 340541, 367 93, E05F 1520, G05B 902
Patent
active
059126256
ABSTRACT:
A control system utilizes generated acoustic or electromagnetic waves within a deformable wall wave guide. The wave guide is located in the surveillance area and, upon the wave guide being deformed by an obstruction or an intruder, the characteristics of the wave within the change. The change is sensed by a receiver which produces a control signal to activate an alarm and/or an operating system if the control system is used to control moving elements, such as a door or gate. The wave guide can constitute a homogeneous portion of door weatherstripping.
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