Relamping circuit for battery powered ballast

Details Relamping circuit for battery powered ballast Relamping circuit for battery powered ballast

2007-07-27

2010-06-01

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Automatic substitution of the power supply

C315S2090SC, C315S226000

Reexamination Certificate

active

07728525

ABSTRACT:
A ballast (e.g. a fluorescent light ballast) includes a primary ballast for powering the lamp from a power supply (e.g., utility line power) and an battery powered ballast for powering the lamp from a battery when the primary power supply is not energized by the power supply. When power supply power is restored to the ballast, the ballast shuts down the battery powered ballast and a switch circuit operably connects the lamp to the primary ballast. The ballast toggles the switch circuit such that the primary ballast detects replacement of a lamp and resets any fault detection or protection circuits (e.g., an end of lamp life circuit) that may have been triggered during the transition from battery power to power from the power supply.

REFERENCES:
patent: 4977351 (1990-12-01), Bavaro et al.
patent: 5854538 (1998-12-01), Krummel
patent: 5986407 (1999-11-01), Chang
patent: 6140771 (2000-10-01), Luger et al.
patent: 6339296 (2002-01-01), Goral
patent: 6366031 (2002-04-01), Klien
patent: 6628083 (2003-09-01), Pickering
patent: 6972531 (2005-12-01), Krummel
patent: 7084579 (2006-08-01), Konopka et al.
patent: 7187132 (2007-03-01), Bakre
patent: 7218063 (2007-05-01), Konopka et al.

Affiliated with

Also associated with

Rating

Relamping circuit for battery powered ballast does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Relamping circuit for battery powered ballast, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relamping circuit for battery powered ballast will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4207154