GB906888A - Improvements in or relating to circuit arrangements for operating electric dischargelamps with alternating current - Google Patents
Improvements in or relating to circuit arrangements for operating electric dischargelamps with alternating currentInfo
- Publication number
- GB906888A GB906888A GB674160A GB674160A GB906888A GB 906888 A GB906888 A GB 906888A GB 674160 A GB674160 A GB 674160A GB 674160 A GB674160 A GB 674160A GB 906888 A GB906888 A GB 906888A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- resistor
- voltage
- supply
- dischargelamps
- 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
- H05B41/23—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 not having an auxiliary starting electrode
- H05B41/232—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 not having an auxiliary starting electrode for low-pressure lamps
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
906,888. Discharge lamp circuits. GENERAL ELECTRIC CO. Ltd. Feb. 22, 1961 [Feb. 25, 1960], No. 6741/60. Addition to 847,391. Class 38 (4). In an arrangement as disclosed in the parent Specification modified for use on a supply of not less than 300 c.p.s., the ballast is a capacitor 3, and a branch circuit comprising a rectifier 6 and a resistor 7 is connected directly across the lamp. Initially, the rectifier 6 charges the capacitor 3 to approximately peak A.C. voltage which is additional to one half wave of the supply voltage, and which is sufficient to strike the lamp. After striking, the D.C. voltage across the lamp falls and D.C. current circulating through the lamp is restricted by a resistor 7. A starting strip 12 may be connected to one terminal 2 of the supply through a resistor 13. If the lamp has heatable electrodes, a heating transformer 8-10 may be provided. The lamp striking voltage may be increased by connecting the resistor 7 to a point 14. Another arrangement described in the Specification (Fig. 2, not shown), has additional auto-transformer windings for increasing the lamp and D.C. voltages respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB674160A GB906888A (en) | 1960-02-25 | 1960-02-25 | Improvements in or relating to circuit arrangements for operating electric dischargelamps with alternating current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB674160A GB906888A (en) | 1960-02-25 | 1960-02-25 | Improvements in or relating to circuit arrangements for operating electric dischargelamps with alternating current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB906888A true GB906888A (en) | 1962-09-26 |
Family
ID=9819933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB674160A Expired GB906888A (en) | 1960-02-25 | 1960-02-25 | Improvements in or relating to circuit arrangements for operating electric dischargelamps with alternating current |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB906888A (en) |
-
1960
- 1960-02-25 GB GB674160A patent/GB906888A/en not_active Expired
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