Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1979-10-22
1981-09-01
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
340531, 340666, G08B 1310
Patent
active
042875110
ABSTRACT:
Structural moment detectors are carried by structural components, such as floors, walls, etc., within a desired secure area of a building structure. The structural moment detector detects deflections of the various structural members in response to changes of the loading of structural members caused by the intruder and generates signals which are transmitted to a control center which receives the intrusion signals and generates alarm signals.
The intrusion signals are transmitted to the control center through the building structure as impulsive loads applied to the building structure by transducers located in the secure area which are responsive to the signals generated by the structural moment detectors.
The alarm signals generated in the control center are transmitted to security system located in the secure area, such as automatic door locking mechanisms, lights, audible alarms, disabling gas injecting systems, etc., by means of coded impulsive loads applied to the building structure by transducers located in the control center which are responsive to the intrusion signals.
REFERENCES:
patent: 3534356 (1970-10-01), Bagno
Rhoades Thomas S.
Scott David R.
Scott Science and Technology, Inc.
Swann III Glen R.
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