GB551487A - Improvements in circuit arrangements for operating electric discharge lamps - Google Patents
Improvements in circuit arrangements for operating electric discharge lampsInfo
- Publication number
- GB551487A GB551487A GB1073641A GB1073641A GB551487A GB 551487 A GB551487 A GB 551487A GB 1073641 A GB1073641 A GB 1073641A GB 1073641 A GB1073641 A GB 1073641A GB 551487 A GB551487 A GB 551487A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electric discharge
- discharge lamps
- lamp
- circuit arrangements
- operating electric
- 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
-
- 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
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
551,487. Electricity supply to electric discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., and GRAPES, G. T. Aug. 22, 1941, No. 10736. [Class 38 (iv)] The current flow through a discharge lamp L is controlled without appreciably affecting the stability of the discharge by connecting the lamp across a semi-resonant circuit, consisting of series inductance Li and shunt condenser C, and including in the lamp circuit itself a series variable resistance R or variable inductance. In the circuit shown, a fixed series inductance Li and variable resistance R are employed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1073641A GB551487A (en) | 1941-08-22 | 1941-08-22 | Improvements in circuit arrangements for operating electric discharge lamps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1073641A GB551487A (en) | 1941-08-22 | 1941-08-22 | Improvements in circuit arrangements for operating electric discharge lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB551487A true GB551487A (en) | 1943-02-24 |
Family
ID=9973344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1073641A Expired GB551487A (en) | 1941-08-22 | 1941-08-22 | Improvements in circuit arrangements for operating electric discharge lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB551487A (en) |
-
1941
- 1941-08-22 GB GB1073641A patent/GB551487A/en not_active Expired
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