Radiant energy testing device for fire detectors

A testing device for fire detectors comprises a resistance heating coil disposed outwardly of a clear central area and a collar located to one side of and about the resistance heating element for locating of a fire detector relative to the heating element. The heating element is of a low thermal mas...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	DUGGAN, JACK, MATTHEWS, ROBERT
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
Online-Zugang:	Volltext bestellen
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