Security system

Details Security system Security system

1977-10-26

1979-01-02

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

With particular system function

340533, 340568, G08B 1300

Patent

active

041329872

ABSTRACT:
A security system of the type including one or more electrically-continuous closed loops for detecting the presence of an intruder wherein a breach in security indicative of the intrusion is sensed by a change in potential at a point along the line with which the closed loop is electrically connected.

REFERENCES:
patent: 3938124 (1976-02-01), Way et al.

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