System for detecting the failure of a filament lamp

Details System for detecting the failure of a filament lamp System for detecting the failure of a filament lamp

1986-01-08

1987-05-26

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

307 10LS, 315 82, 340 79, G08B 2100

Patent

active

046689460

ABSTRACT:
A filament lamp outage indicator system in which the actuation of an on/off switch to its on position is sensed to enable a logic circuit in the event a current flow increase is not inductively detected in a conductor in series with the switch and a corresponding filament lamp.

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patent: 4376909 (1983-03-01), Tagami et al.

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