High-reliability light fixture and method

Details High-reliability light fixture and method High-reliability light fixture and method

2005-07-11

2010-02-09

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S291000, C315S323000, C315S360000, C340S479000

Reexamination Certificate

active

07659671

ABSTRACT:
A light fixture includes multiple sets of light-producing devices, such as bulbs. A first set of bulbs is illuminated. When one or more bulbs in the first set of bulbs fails, the failure is detected, and a second set of bulbs is illuminated: If a number of good bulbs remaining falls below a predetermined threshold, the light fixture provides a notification that a bulb change is required. The notification may include visual, audio, or electronic notification. By providing multiple sets of bulbs and a controller to detect a bulb failure and automatically switch to a different set of bulbs, the light fixture and method of the preferred embodiments provide high-reliability lighting that automatically compensates when a bulb burns out.

REFERENCES:
patent: 3842703 (1974-10-01), Okamoto et al.
patent: 3935514 (1976-01-01), Ellin
patent: 4437748 (1984-03-01), Kelly
patent: 4550303 (1985-10-01), Steele
patent: 5955945 (1999-09-01), Fuhrer
patent: 6278382 (2001-08-01), DeMarco et al.
patent: 6828739 (2004-12-01), Bruwer et al.

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