GB849947A - Improvements relating to control circuits for electric discharge lamps - Google Patents
Improvements relating to control circuits for electric discharge lampsInfo
- Publication number
- GB849947A GB849947A GB1045858A GB1045858A GB849947A GB 849947 A GB849947 A GB 849947A GB 1045858 A GB1045858 A GB 1045858A GB 1045858 A GB1045858 A GB 1045858A GB 849947 A GB849947 A GB 849947A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- electric discharge
- discharge lamps
- control circuits
- improvements relating
- 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
- H05B41/14—Circuit arrangements
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
- H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
- H05B41/22—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps having an auxiliary starting electrode
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
849,947. Supply systems for discharge lamps. BRITISH THOMSON-HOUSTON CO. Ltd. March 26, 1959 [April 1, 1958], No. 10458/58. Class 38 (4). In order to facilitate the starting of an electric discharge lamp 1 the potential gradient between one of the lamp electrodes 2 and an earthed metal starting electrode 3 is increased by connecting the starting electrode 3 to the junction between a half-wave rectifier 7 and a capacitor 8, which are serially connected in shunt with the lamp discharge path. A leak resistor 10 may be connected across the capacitor 8. The lamp may be provided with heatable electrodes. The lamp fitting may be used for the metal starting electrode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1045858A GB849947A (en) | 1958-04-01 | 1958-04-01 | Improvements relating to control circuits for electric discharge lamps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1045858A GB849947A (en) | 1958-04-01 | 1958-04-01 | Improvements relating to control circuits for electric discharge lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB849947A true GB849947A (en) | 1960-09-28 |
Family
ID=9968235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1045858A Expired GB849947A (en) | 1958-04-01 | 1958-04-01 | Improvements relating to control circuits for electric discharge lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB849947A (en) |
-
1958
- 1958-04-01 GB GB1045858A patent/GB849947A/en not_active Expired
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