Starting circuit for multiple fluorescent lamps
US4562381A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1984 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Sep 13, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Two or more fluorescent lamps having a total length of about 96 inches and each having a diameter of one and a half inches and consuming less than 10 watts power per foot of length are connected in electrical series combination, one cathode of each lamp being connected to that of another lamp. An end of each remaining cathode of the combination is respectively connected to one of a pair of input electrical power terminals for a 50 or 60 hertz a-c line voltage in the range of 200 to 300 volts, one of the latter connections being via a ballast inductor. A starter switch is connected across the other ends of the remaining cathodes, and a secondary winding on the ballast inductor is connected across the interconnected cathodes. The lamp designs are specified such that they will start and operate in the circuit from the a-c line voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.