GB633448A - Apparatus for operating electric discharge lamps in series - Google Patents
Apparatus for operating electric discharge lamps in seriesInfo
- Publication number
- GB633448A GB633448A GB21690/47A GB2169047A GB633448A GB 633448 A GB633448 A GB 633448A GB 21690/47 A GB21690/47 A GB 21690/47A GB 2169047 A GB2169047 A GB 2169047A GB 633448 A GB633448 A GB 633448A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- series
- discharge lamps
- supply
- ballast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/02—Details
- H05B41/04—Starting switches
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
633,448. Supply systems for space discharge lamps. SYLVANIA ELECTRIC PRODUCTS, Inc. Aug. 7, 1947, No. 21690. Convention date, Oct. 26, 1940. [Class 38 (iv)] Series systems.-In an apparatus which provides simultaneous starting of two discharge lamps 11, 12, the ballast impedance 13, the filamentary electrode 9 of one lamp, a starting switch 18, the primary winding of a transformer 20 and the filamentary electrode 10 of the other lamp are connected in series, and the secondary winding of the transformer 20 is connected to supply the other two filamentary electrodes 16, 17. A condenser 19 may be shunted across the primary winding of the transformer to increase the heating current through the electrodes. The ballast may comprise a choke coil, or in the case of low wattage lamps an incandescent lamp; alternatively, when the supply is derived from an auto-transformer 3 having a high leakage reactance, the separate ballast may be omitted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US633448XA | 1940-10-26 | 1940-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB633448A true GB633448A (en) | 1949-12-19 |
Family
ID=22048565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21690/47A Expired GB633448A (en) | 1940-10-26 | 1947-08-07 | Apparatus for operating electric discharge lamps in series |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB633448A (en) |
-
1947
- 1947-08-07 GB GB21690/47A patent/GB633448A/en not_active Expired
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