Intrusion detector

Details Intrusion detector Intrusion detector

1982-09-24

1985-12-31

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

340553, 340505, 340517, 340531, G01B 1318, G01B 2600

Patent

active

045624283

ABSTRACT:
This invention is an intrusion detector which uses codirectionally coupled CW leakly cable sensor techniques. Successive sensors are connected serially through R.F. decouplers, and each is polled and is sent power from a control unit via the serial cables, through the decouplers. The detector thus provides both intrusion detection and a secure data link.

REFERENCES:
patent: 3732562 (1973-05-01), Faber et al.
patent: 3765016 (1973-10-01), Bert et al.
patent: 4091367 (1978-05-01), Harman
patent: 4135185 (1979-01-01), Rotman et al.
patent: 4213123 (1980-07-01), Poirier
patent: 4415885 (1983-11-01), Mongeon
patent: 4458240 (1984-07-01), Rittenbach et al.

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