ALARM SCREEN WITH BUILT-IN BATTERY OPERATED SOUNDING UNIT

A self-contained alarm screen apparatus (10) for securing building openings (12) against intruders includes a screen sheet (20) having a screen peripheral edge (24), a frame (22) secured to the screen peripheral edge (24) for providing structural support to the screen sheet (20), a conductive detect...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZAHN, RICHARD, A., JR, STEPP, MERLE, L
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ALARM SYSTEMS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
Online-Zugang:	Volltext bestellen
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