GB671155A - Circuit arrangement for starting and feeding two electric discharge apparatus - Google Patents
Circuit arrangement for starting and feeding two electric discharge apparatusInfo
- Publication number
- GB671155A GB671155A GB5121/50A GB512150A GB671155A GB 671155 A GB671155 A GB 671155A GB 5121/50 A GB5121/50 A GB 5121/50A GB 512150 A GB512150 A GB 512150A GB 671155 A GB671155 A GB 671155A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- electrodes
- starting
- inductance
- transformer
- 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
671,155. Supply systems for space discharge lamps. SOC. ANON. POUR LES APPLICATIONS DE L'ELECTRICITE ET DES GAZ RARES-ETABLISSEMENTS CLAUDEPAZ ET SILVA. Feb. 28, 1950 [March 11, 1949; Oct. 25, 1949], No. 5121/50. Class 38 (iv). Two parallel operating discharge lamps 3, 4 having filamentary electrodes 31, 32 and 41, 42 are supplied through ballast impedances comprising respectively for lamp 3 an inductance and lamp 4 an inductance 11 in series with a predominant capacitative reactance 12 to give a resultant high-power factor and reduce the stroboscopic effect, the preheating of the electrodes being effected from a transformer 61, 81 associated with each lamp and comprising a primary winding 58, 88 in parallel with the lamp and a pair of auto-connected secondary windings 52, 53 and 82, 83 for supplying the heating current, so as to obtain a reduction in heating current whilst the lamp is operating. The electrodes may be connected across the outer part of the secondary windings as shown, so as to increase the voltage applied to the lamp. The two lamps and associated ballasts may be connected to the supply 1, 2 through a single auto-transformer 5-10 provided with a high leakage reactance to permit the separate inductive ballast for lamp 3 to be dispensed with. An external starting strip, preferably connected to an electrode through a high resistance, may be provided to improve starting.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR671155X | 1949-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB671155A true GB671155A (en) | 1952-04-30 |
Family
ID=9016814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5121/50A Expired GB671155A (en) | 1949-03-11 | 1950-02-28 | Circuit arrangement for starting and feeding two electric discharge apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB671155A (en) |
-
1950
- 1950-02-28 GB GB5121/50A patent/GB671155A/en not_active Expired
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