Emergency lighting control bypass
US11476703B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2021 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Feb 26, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/068
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is described an emergency lighting system for minimizing power leakage to assure proper operation of an emergency mode. The system comprises a digital addressable lighting bus having digital control lines, a driver, and a lighting control. The driver receives emergency power and provides the emergency power to a light emitter in response to detecting that the digital control lines are shorted. The lighting control receives normal power and includes a relay contact that shorts the digital control lines in response to detecting lack of the normal power. For another aspect, the driver and the lighting control are coupled to lighting control lines, which are either digital or analog control lines. For yet another aspect, a control bypass comprises a power unit, a relay coil, and a relay contact. The relay contact manages outputs of the power unit in response to activation and de-activation by the relay coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.