Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1978-03-06
1980-11-18
Caldwell, Sr., John W.
Communications: electrical
Condition responsive indicating system
Specific condition
340541, 340555, 340652, 109 41, 109 42, 200 6108, G08B 1312, E05G 110
Patent
active
042348757
ABSTRACT:
A security panel arrangement for use with an intrusion alarm system designed to monitor the continuity of a normally continuous signal conductive path and to produce a warning signal when the signal conductive path is broken, which arrangement includes a cellular panel forming a series of parallel elongated passages through which extends at least one means for conducting a signal. The cellular panel is attached to a surface portion of a structure to be secured, and the means for conducting a signal is connected at its two ends to the alarm system in a continuity monitoring relationship therewith. Passage of a human being through the surface portion breaks the continuity of the means for conducting a signal and causes the alarm system to produce the warning signal.
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patent: 3051935 (1962-08-01), Willson
patent: 3594770 (1971-07-01), Ham
patent: 3725891 (1973-04-01), Miller
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Caldwell Sr. John W.
Crosland Donnie L.
Sandstone, Inc.
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