Emergency lighting supervisory system
US4799039A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1987 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | May 8, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/21
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An emergency lighting supervisory system monitors utility power so as to automatically connect emergency lights to a battery source when utility power fails. The system continuously monitors selected parameters and, automatically, periodically tests the system under simulated full-load emergency conditions and annunciates the results of these tests. Such periodic tests also enhance battery capacity. The system also provides a closed loop three-mode battery charging control circuit. It can optionally communicate its status as well as receive commands from an external computer or other source by means of a data communication interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.