GB643781A - Fluorescent tube lighting systems - Google Patents
Fluorescent tube lighting systemsInfo
- Publication number
- GB643781A GB643781A GB251947A GB251947A GB643781A GB 643781 A GB643781 A GB 643781A GB 251947 A GB251947 A GB 251947A GB 251947 A GB251947 A GB 251947A GB 643781 A GB643781 A GB 643781A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- lamps
- series
- byepass
- ballast
- 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
643,781. Supply systems for space discharge lamps. NATHANSON, M. Jan. 27, 1947, No. 2519. [Class 38 (iv)] Series systems.-To start a plurality of series connected discharge lamps 36-38 from an A.C. source. 20 of voltage substantially lower than the sum of the lamp striking voltages, a byepass impedance, such as condensers 46, 51, are connected between the series functions of the lamps and that terminal of the supply to which is connected the usual series ballast, e.g. condenser 40, so that adequate starting voltage is applied to each lamp in turn as the preceding lamp strikes. The byepass and. ballast impedances may alternatively constitute inductances. Power factor improvement may be effected by parallel connecting two groups of lamps, or one group and a single lamp 39, provided respectively with capacitive and inductive ballasts and byepass impedances. The lamps may be supplied through an auto transformer in which case the inductive ballast may be dispensed with by supplying the inductive lamp group through a separate secondary winding 11 spaced from the primary winding 9 by a magnetic shunt 17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB251947A GB643781A (en) | 1947-01-27 | 1947-01-27 | Fluorescent tube lighting systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB251947A GB643781A (en) | 1947-01-27 | 1947-01-27 | Fluorescent tube lighting systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB643781A true GB643781A (en) | 1950-09-27 |
Family
ID=9740987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB251947A Expired GB643781A (en) | 1947-01-27 | 1947-01-27 | Fluorescent tube lighting systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB643781A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253005A (en) * | 2020-02-07 | 2021-08-13 | 群光电能科技股份有限公司 | Load recognition system |
-
1947
- 1947-01-27 GB GB251947A patent/GB643781A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253005A (en) * | 2020-02-07 | 2021-08-13 | 群光电能科技股份有限公司 | Load recognition system |
| CN113253005B (en) * | 2020-02-07 | 2024-01-12 | 群光电能科技股份有限公司 | Load identification system |
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