Distributed emergency lighting system having self-testing and diagnostic capabilities
US6788000B2 · kind B2 · utility
84Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 2001 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Sep 2, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distributed emergency building lighting system senses the presence or absence of AC power at the input of a switch controlling lighting in a designated area or an input stimulus such as an alarm to provide low-level marking for visual delineation of the path of egress or lighting of a predetermined designated area by illuminating an EL panel in accordance with code requirements. Self-diagnostic testing verifies operational conditions of the battery and illumination circuit to ensure code compliance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.