GB685273A - Improvements in and relating to starting circuits for fluorescent lamps - Google Patents
Improvements in and relating to starting circuits for fluorescent lampsInfo
- Publication number
- GB685273A GB685273A GB4331/51A GB433151A GB685273A GB 685273 A GB685273 A GB 685273A GB 4331/51 A GB4331/51 A GB 4331/51A GB 433151 A GB433151 A GB 433151A GB 685273 A GB685273 A GB 685273A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- relating
- fluorescent lamps
- switches
- ballast impedance
- 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
- H05B41/19—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 for lamps having an auxiliary starting electrode
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
685,273. Supply systems for space discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 22, 1951 [March 14, 1950], No. 4331/51. Class 38 (iv). Voltage pulses induced in the secondary winding 11 of a transformer 9 by the opening of automatic or manually-operated switches 7, 7<SP>1</SP> cause capactative electrodes 12, 12<SP>1</SP> to ionize the gas and thereby ignite a plurality of seriesconnected discharge lamps 1, 1<SP>1</SP> supplied with A.C. or D.C. through a ballast impedance 2 and the primary winding 10 of the transformer. The switches are of the glow type, as shown, or of a thermal type. The transformer may alternatively be double-wound, and the ballast impedance may comprise an incandescent lamp. If the supply voltage is very low one switch 7<SP>1</SP> may be shunted by a resistor 19 to enable starting.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US685273XA | 1950-03-14 | 1950-03-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB685273A true GB685273A (en) | 1952-12-31 |
Family
ID=22083139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4331/51A Expired GB685273A (en) | 1950-03-14 | 1951-02-22 | Improvements in and relating to starting circuits for fluorescent lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB685273A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1142417B (en) * | 1957-06-08 | 1963-01-17 | Bbc Brown Boveri & Cie | Circuit arrangement for starterless ignition of low-voltage fluorescent lamps |
DE3127876A1 (en) * | 1981-07-15 | 1983-02-03 | Harald 7012 Fellbach Lück | METHOD AND DEVICE FOR STARTING FLUORESCENT LAMPS |
-
1951
- 1951-02-22 GB GB4331/51A patent/GB685273A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1142417B (en) * | 1957-06-08 | 1963-01-17 | Bbc Brown Boveri & Cie | Circuit arrangement for starterless ignition of low-voltage fluorescent lamps |
DE3127876A1 (en) * | 1981-07-15 | 1983-02-03 | Harald 7012 Fellbach Lück | METHOD AND DEVICE FOR STARTING FLUORESCENT LAMPS |
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