GB622799A - Improvements relating to fluorescent electric lighting systems - Google Patents
Improvements relating to fluorescent electric lighting systemsInfo
- Publication number
- GB622799A GB622799A GB958947A GB958947A GB622799A GB 622799 A GB622799 A GB 622799A GB 958947 A GB958947 A GB 958947A GB 958947 A GB958947 A GB 958947A GB 622799 A GB622799 A GB 622799A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- transformer
- circuited
- discharge
- short
- 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
- H05B41/18—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 a starting switch
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
622,799. Supply systems for discharge apparatus; transformers; inductance. MANDL, A., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. April 10, 1947, No. 9589. [Classes 38 (ii) and 38 (iv)] In a lighting system with one terminal of each filamentary discharge electrode connected together through a condenser while the others are connected to the supply, a transformer has its primary in shunt to the condenser and the secondary open or short-circuited by a switch whereby the primary reactance of the transformer is low enough for heating current to pass with the secondary short-circuited and high enough to raise the condenser voltage for initiating the discharge when the secondary is open-circuited. As shown, short-circuiting of secondary of transformer 8 by switch 10 permits preheating of electrodes 1, 2 and open-circuiting enables voltage across condenser 4 to rise and initiate the discharge. Chokes 7, 9 may be connected as shown and may be on a common core with the transformer windings (primary coils 16, secondary coils 17) as shown in Fig. 2. Specification 601,809 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB958947A GB622799A (en) | 1947-04-10 | 1947-04-10 | Improvements relating to fluorescent electric lighting systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB958947A GB622799A (en) | 1947-04-10 | 1947-04-10 | Improvements relating to fluorescent electric lighting systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB622799A true GB622799A (en) | 1949-05-06 |
Family
ID=9874911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB958947A Expired GB622799A (en) | 1947-04-10 | 1947-04-10 | Improvements relating to fluorescent electric lighting systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB622799A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2216729A (en) * | 1988-03-08 | 1989-10-11 | Kijima Co Ltd | A compact transformer |
WO2008119406A1 (en) * | 2007-04-02 | 2008-10-09 | Tridonicatco Gmbh & Co. Kg | Ballast for a gas discharge lamp |
-
1947
- 1947-04-10 GB GB958947A patent/GB622799A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2216729A (en) * | 1988-03-08 | 1989-10-11 | Kijima Co Ltd | A compact transformer |
GB2216729B (en) * | 1988-03-08 | 1992-07-08 | Kijima Co Ltd | A compact transformer |
WO2008119406A1 (en) * | 2007-04-02 | 2008-10-09 | Tridonicatco Gmbh & Co. Kg | Ballast for a gas discharge lamp |
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