Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-09-09
1993-12-07
Peng, John K.
Communications: electrical
Condition responsive indicating system
Specific condition
340668, G08B 1300
Patent
active
052686728
ABSTRACT:
An intrusion detection system for a space secured in part by a deflectable physical barrier includes a cable sensor mounted on the barrier in such manner that it stretches and flexes in response to deflection of the barrier, thereby to produce an output signal representing such movement. A signal processor receives the signal from the coaxial cable and provides an output affirmative signal if the amplitude of the cable signal, within a predetermined frequency range lying below about 30 Hz, exceeds a predetermined level for a predetermined time interval.
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Information Sheet/Vindicator Corporation Locator TW-3000/Taut Wire Alarm No. of pages : 10.
Hitek-Protek Systems Incorporated
Mullen Jr. Thomas J.
Peng John K.
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