Lighting
First Claim
1. Aircraft emergency lighting having a power source for illumination of emergency lighting in an emergency, said power source including one or more electric double layer capacitors, and control means for testing said one or more electric double layer capacitors, said control means being configured to test the one or more electric double layer capacitors in response to switching off the emergency lighting.
1 Assignment
0 Petitions
Accused Products
Abstract
Emergency lighting for an aircraft has a primary power source for light units provided by the normal aircraft power supply and a secondary power source provided by power supply units operable to back-up the primary power source. Each light unit may have its own power supply unit operable to power the light unit in an emergency if the normal aircraft power supply fails or is otherwise unable to power the emergency lighting. Each power supply unit includes one or more electric double layer capacitors that are charged whenever the normal aircraft power supply is operational to provide the primary power source. The useful life of the electric double layer capacitors may be prolonged by reducing the capacitor voltage when the emergency lighting is switched off.
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Citations
14 Claims
- 1. Aircraft emergency lighting having a power source for illumination of emergency lighting in an emergency, said power source including one or more electric double layer capacitors, and control means for testing said one or more electric double layer capacitors, said control means being configured to test the one or more electric double layer capacitors in response to switching off the emergency lighting.
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12. An aircraft having an emergency lighting system including a plurality of light units, a primary power source for said light units, a secondary power source for said light lights, said secondary power source being configured as a back-up for said primary source, wherein said secondary power source includes one or more electric double layer capacitors configured to be charged by said primary power source, and control means configured to test said one or more electric double layer capacitors of said secondary power source and provide an indication of a condition of the secondary power source in response to switching the emergency lighting from an “
- armed”
condition to an “
off”
condition. - View Dependent Claims (13, 14)
- armed”
Specification