Combined intrusion sensor line

Details Combined intrusion sensor line Combined intrusion sensor line

1977-11-17

1979-03-13

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

174 70R, 250199, 340505, 340524, 340531, 350 9623, G08B 1322

Patent

active

041445309

ABSTRACT:
A single composite cable is deployed between adjacent monitoring stations r sensing an intruder. A number of piezoelectric elements disposed in the cable provide electrical intrusion signals when they are disturbed. Power and triggering pulses for the stations are fed through the cable by a pair of electrical conductors and optical signals representative of the intrusion signals are fed through at least one optical fiber. As a result, the composite cable is relatively lightweight and compact to simplify deployment and it avoids the problems normally associated with crosstalk.

REFERENCES:
patent: 3401469 (1968-09-01), Shaver et al.
patent: 3660590 (1972-05-01), Conant
patent: 3806908 (1974-04-01), Bound et al.
patent: 3833897 (1974-09-01), Bell et al.

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