GB856773A - Improvements in and relating to gaseous discharge lamp circuits - Google Patents
Improvements in and relating to gaseous discharge lamp circuitsInfo
- Publication number
- GB856773A GB856773A GB3087458A GB3087458A GB856773A GB 856773 A GB856773 A GB 856773A GB 3087458 A GB3087458 A GB 3087458A GB 3087458 A GB3087458 A GB 3087458A GB 856773 A GB856773 A GB 856773A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- capacitor
- lamp
- transformer
- series
- 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
- H05B41/2325—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 provided with pre-heating electrodes
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
856,773. Supply systems for space-discharge apparatus. THORN ELECTRICAL INDUSTRIES Ltd. Sept. 10, 1959 [Sept. 26, 1958], No. 30874/58. Class 38 (4). A gaseous discharge lamp circuit arrangement having improved starting facilities includes A.C. mains supply terminals N, L across which are connected two circuits: a first circuit comprising a transformer primary 2-3 and a choke G connected in series; a second circuit comprising a first filament A of lamp F, a first transformer secondary 1-2 and a capacitor C. The circuit arrangement is completed by a third circuit comprising the second transformer secondary 3-4 connected in series with the second filament B of lamp F. On switching terminals N, L into the A.C. supply, a momentary surge of current occurs through the second circuit whilst capacitor C is charging up, resulting in the application across the lamp of a high-voltage ionizing pulse for assisting starting. Another embodiment includes a tapped choke G and a discharge resistor connected across capacitor C. Further embodiments differ in the connectionpoint of the choke to the transformer, and in the connections between the capacitor C, secondary 1-2 and filament A, but in all the capacitor, secondary and filament form a series circuit between the terminals L, N. The circuit may be adapted to feed a plurality of lamps in series, by providing the transformer with further isolated secondary windings for supplying the intermediate lamp filaments.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3087458A GB856773A (en) | 1958-09-26 | 1958-09-26 | Improvements in and relating to gaseous discharge lamp circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3087458A GB856773A (en) | 1958-09-26 | 1958-09-26 | Improvements in and relating to gaseous discharge lamp circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB856773A true GB856773A (en) | 1960-12-21 |
Family
ID=10314476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3087458A Expired GB856773A (en) | 1958-09-26 | 1958-09-26 | Improvements in and relating to gaseous discharge lamp circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB856773A (en) |
-
1958
- 1958-09-26 GB GB3087458A patent/GB856773A/en not_active Expired
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