ENTRANCE SECURITY SYSTEM

An entrance denial security system comprises an entrance barrier closing an entrance into a secured area having a plurality of structural tubular elements with hollow cores forming a rigid integral barrier. At least one optical fiber sensor line is laced through the hollow cores of the structural el...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	DEYOUNG, CLIFFORD, LEROY, BROWNING, THOMAS, E., JR, PIPER, DOUGLAS, E, OWENS, MARY, HESTER
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ALARM SYSTEMS ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE CHECKING-DEVICES GENERATING RANDOM NUMBERS ORDER TELEGRAPHS PHYSICS REGISTERING OR INDICATING THE WORKING OF MACHINES SIGNALLING SIGNALLING OR CALLING SYSTEMS TIME OR ATTENDANCE REGISTERS VOTING OR LOTTERY APPARATUS
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