Communications: electrical – Systems – With specific power supply
Patent
1995-03-10
1996-11-12
Hofsass, Jeffery
Communications: electrical
Systems
With specific power supply
340642, 340332, 340514, 340515, 362 20, G08B 100
Patent
active
055744230
ABSTRACT:
A self-diagnostic circuit for an emergency lamphead is disclosed that is effective during standby operation of the lamphead to indicate whether the lamphead is capable of operating in an emergency mode. The self-diagnostic circuit includes a high-impedance circuit path connected in series with the lamphead and including an indicator, such as an LED, which is energized by a battery current passing through the circuit path and lamphead during the standby mode operation. The battery current is insufficient to illuminate the lamphead, but is sufficient to energize the LED whenever proper electrical continuity exists through the lamphead. A second high-impedance circuit path may be connected in parallel with the lamphead, in order to energize a second LED when proper continuity does not through the lamphead. The self-diagnostic circuit may be incorporated into each of a plurality of remote lampheads in a multiple-lamphead system, and may include a bipolar transistor or FET for isolating the self-diagnostic circuits of the lampheads from each other.
REFERENCES:
patent: 4223232 (1980-09-01), Bulat
patent: 4447806 (1984-05-01), Gundel et al.
patent: 4544910 (1985-10-01), Hoberman
patent: 4667187 (1987-05-01), Volk et al.
patent: 4799039 (1989-01-01), Balcom et al.
patent: 4808975 (1989-02-01), Hochhaus et al.
patent: 5145504 (1992-09-01), Helal et al.
patent: 5148158 (1992-09-01), Shah
"Introducing the Factor-Hubbell's Self-Diagnostic System for the Pathfinder Series" (Apr. 1993).
"Spectron Series" (undated product information).
"hiQ Smarttest Self-Diagnostic Systems" (undated product information).
"Lightalarms Emergency Lighting Equipment" (undated product information).
"Advanced Emergency Lighting Technology" (undated product information).
"AtLite Emergency Lighting" (undated product information).
"High-Lites Emergency Light Options" (1992).
"Hubbell Lighting Inc.-Pathfinder Diagnostic Emergency Products" (undated product information).
Feldstein Robert S.
Vosika David A.
'Hubbell Incorporated
Ghannam Mohammed
Hofsass Jeffery
Holmes John E.
Presson Jerry M.
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