System including an indicator responsive to an electret for a power bus

An indicator system for an alternating current power bus includes an electret operatively associated with the alternating current power bus. The electret includes an output having an alternating current voltage when the alternating current power bus is energized. A rectifier includes an input electr...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	TRUBLOWSKI JOHN, KOVACICH JOHN A
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS TESTING
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