Device for monitoring the serviceability of optical indicators

Details Device for monitoring the serviceability of optical indicators Device for monitoring the serviceability of optical indicators

1978-03-23

1979-10-02

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

With particular system function

315135, 340642, G08B 2100

Patent

active

041700040

ABSTRACT:
A system for monitoring the operability of warning lamps which provide a visual signal in the event of the malfunction or unacceptable variation of a monitored function or control comprising a plurality of optical indicators or warning lamps electrically coupled to a single-control switch common to all warning lamps such that all lamps may be simultaneously illuminated upon the closing of the switch to determine their operability.

REFERENCES:
patent: 2839741 (1958-06-01), Kratville
patent: 3597729 (1971-08-01), Lopez

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