Non-light producing substitute apparatus for use in place of phosphor excitable lamps
US4348614A · kind A · utility
Inventor
Key dates
| Filing date | Jan 28, 1980 |
| Grant date | Sep 7, 1982 |
| Priority date | — |
| Expiry date | Jan 28, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A non-light producing substitute apparatus for use as a replacement for a phosphor energizable lamp in an arrangement where a plurality of such lamps are connected in a series electrical circuit. Typically, two or more phosphor energizable lamps, such as fluorescent lamps, are connected to pairs of spaced apart sockets in a fixture and if one of the lamps is burned out or is removed, there is ineffective operation of the remaining lamp. The substitute apparatus permits one of the series connected lamps to be removed with the other to operate without substantially affecting lumen output of the remaining lamp and power factor loss. The substitute apparatus of the present invention is effective in that it does not necessarily create a connection between the two terminals in the pair of spaced apart sockets from which the lamp was removed. The substitute apparatus creates a grounding of the ballast or similar power generator or other power source which operates the fixture, or otherwise a ground plane in the fixture with respect to the sockets so that at least one of the sockets from which the lamp was removed is at the same ground potential as either the ballast or the ground plane of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.