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US 8,575,787 B2Granted
Emergency lighting methods and systems
AssigneeExelon Generation Company, LLC
InventorWilliam J. Stocker
Life of this patent
Estimating the term…
Abstract
Described herein are systems and methods of emergency lighting comprising one or more light emitting diode (LED) lamps with a low-maintenance or maintenance-free battery. In one aspect, the battery is a sealed lead-acid battery. In one aspect, the battery is an absorbent glass mat (AGM) battery. In one aspect, the LED lamps can be a part of a LED assembly that can include an integrated voltage regulator. In one aspect, the one or more lamps are parabolic aluminized reflector luminares, or PAR lights such as PAR 46 light assemblies.
Claims18
An emergency lighting system comprising:
- a battery;
- at least one LED lamp assembly;
- an AC power source;
- a control device electrically coupled to the AC power source and selectively electrically coupled to the battery and selectively electrically coupled to the at least one LED lamp assembly, wherein the control device is configured to sense AC voltage from the AC power source;
- and
- a means for energizing the at least one LED lamp assembly at a desired lumen level for a desired period of time in a fault operation, in which the control device senses a loss of AC voltage from the AC power source,
- wherein, in a non-fault operation, in which AC voltage from the AC power source is sensed by the control device, the at least one LED lamp assembly can be selectively energized via the AC power source or the battery, and wherein, in the fault operation, the at least one LED lamp assembly is energized via the battery.
4 more elements
An emergency lighting system comprising:
- a battery;
- at least one lamp assembly;
- an AC power source;
- and
- a control device electrically coupled to the AC power source and selectively electrically coupled to the battery and selectively electrically coupled to the at least one lamp assembly, wherein the control device is configured to sense AC voltage from the AC power source,
- wherein, when the control device senses a loss of AC voltage from the AC power source, the at least one lamp assembly is energized via the battery, and wherein when the control device senses AC voltage from the AC power source, the at least one lamp assembly can be selectively energized via the AC power source or the battery.
3 more elements
Dependencies are inferred from the claim text.