Communications: electrical – Condition responsive indicating system – With particular system function
Patent
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
Brown Robert A.
Caldwell Sr. John W.
Fiat-Allis Macchine Movimento Terra S.p.A.
Myer Daniel
Rockwell Harvey W.
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