GB614911A - Improvements in and relating to circuits for electric discharge lamps - Google Patents
Improvements in and relating to circuits for electric discharge lampsInfo
- Publication number
- GB614911A GB614911A GB369345A GB369345A GB614911A GB 614911 A GB614911 A GB 614911A GB 369345 A GB369345 A GB 369345A GB 369345 A GB369345 A GB 369345A GB 614911 A GB614911 A GB 614911A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- circuit
- electrode
- starting
- lamps
- 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
- H05B41/06—Starting switches thermal only
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
614,911. Supply systems for discharge lamps. GENERAL ELECTRIC CO., Ltd., and CATES, J. Feb. 14, 1945, No. 3693. [Class 38 (iv)] A circuit for operating a number of discharge lamps in parallel has a separate circuit for supplying heating current in parallel to one of the electrodes of each lamp and containing a starting switch. A separate stabilizing impedance for the local arc on the electrode is provided for each electrode. The starting switch may be opened automatically to strike the lamps or after ignition. Fig. 4 shows an arrangement for three lamps in series. Fig. 3 shows one of the parallel starting circuits for a lamp D on a D.C. circuit with main stabilizing resistance R and main switch S2. A switch S3 connects an auxiliary D.C. source, which may be derived from the main terminals T1, T2, in series with an automatic switch S closed at starting, and the filamentary electrode a. The switch S1 comprises a bimetallic element M and heater H, which latter is in the main circuit. Where the supply is A.C., a transformer may supply the electrode heating current. The stabilizing resistances R1 and R2 may be tungsten lamps. A separate starting circuit, as described, may be provided for each of the electrodes of a tube. The unheated electrode need not be filamentary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB369345A GB614911A (en) | 1945-02-14 | 1945-02-14 | Improvements in and relating to circuits for electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB369345A GB614911A (en) | 1945-02-14 | 1945-02-14 | Improvements in and relating to circuits for electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB614911A true GB614911A (en) | 1948-12-30 |
Family
ID=9763169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB369345A Expired GB614911A (en) | 1945-02-14 | 1945-02-14 | Improvements in and relating to circuits for electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB614911A (en) |
-
1945
- 1945-02-14 GB GB369345A patent/GB614911A/en not_active Expired
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