Electronic condition sensing system

In the electronic sensing system control means 12 are coupled via two wires 1, 2 to a sensing device 3 forming an electrical loop, the performance of which is altered by the sensing device sensing a particular condition. A current supplied to the loop is repeatedly modulated, using amplitude and fre...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	PETER BASTON
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
Online-Zugang:	Volltext bestellen
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