Time delay lamp ballast circuit
US4425530A · kind A · utility
7Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1981 |
| Grant date | Jan 10, 1984 |
| Priority date | — |
| Expiry date | Oct 22, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multiple fluorescent lamp ballast circuit of the rapid start type in which heating current is supplied to the lamp cathodes. A time delay switch is connected in series with a starting capacitor across one or more of the lamps, to delay lamp starting until the cathodes are sufficiently heated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.