Starterless low-voltage fluorescent-lamp circuit arrangements
US3975660A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1975 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Mar 27, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A starterless circuit arrangement for the ignition and the operation of one or a number of series connected, low voltage fluorescent lamps which are connected with a stray field transformer coupled with a voltage source. The stray field transformer produces the no-load voltage needed for firing the lamps and possesses heating coils which are connected with the electrodes of the lamps. A cold conductor having markedly positive resistance characteristic is connected in parallel with at least part of the secondary winding of the stray field transformer in order to maintain the voltage applied to the lamp(s) at a value beneath the firing or ignition voltage for such length of time until the electrodes of the lamps are pre-heated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.