Fluorescent light unit with dual light levels
US4386296A · kind A · utility
7Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1980 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Dec 19, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A screw-in fluorescent light unit having two light levels, for use in a 3-way socket. A reactor ballasts the lamp for high light output, and a positive temperature coefficient resistor (thermistor) is added to ballast the lamp for low light output and to facilitate lamp starting at the low light output. The light-level sequence is off-high-low-high-off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.