GB703255A - Improvements in electric circuit arrangements for operating low pressure electric discharge lamps having preheatable electrodes - Google Patents
Improvements in electric circuit arrangements for operating low pressure electric discharge lamps having preheatable electrodesInfo
- Publication number
- GB703255A GB703255A GB1944450A GB1944450A GB703255A GB 703255 A GB703255 A GB 703255A GB 1944450 A GB1944450 A GB 1944450A GB 1944450 A GB1944450 A GB 1944450A GB 703255 A GB703255 A GB 703255A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamps
- primary winding
- supply
- discharge lamps
- low pressure
- 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
703,255. Supply systems for space discharge apparatus. GENERAL ELECTRIC CO., Ltd., and CATES, J. July 16, 1951 [Aug. 3, 1950], No. 19444/50. Class 38 (4) At least one pair S1, S2, of electrode-heating secondary windings are so directed that the voltages induced therein are in opposition to that applied to the primary winding P of an instant start circuit arrangement for operating one or more discharge lamps each having two pre-heatable electrodes, the arrangement including the primary winding connected to an A.C. supply, possibly through a ballast impedance, and connections between the primary winding and the said pair of secondary windings for the supply of operating current to the lamp(s), the said connections possibly also or alternatively including a ballast impedance L. The invention is shown applied to two series connected lamps T, T2 of which the adjacent electrodes F2, F3 are supplied by a further secondary winding 3. The lamps have earthed starting strips E1, E2 and radio interference suppression condensers C1, C2. The arrangement may alternatively comprise parallel connected lamps. One ballast impedance may be inductive, capacitive, resistive, combinations thereof, or may comprise incandescent lamps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1944450A GB703255A (en) | 1950-08-03 | 1950-08-03 | Improvements in electric circuit arrangements for operating low pressure electric discharge lamps having preheatable electrodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1944450A GB703255A (en) | 1950-08-03 | 1950-08-03 | Improvements in electric circuit arrangements for operating low pressure electric discharge lamps having preheatable electrodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB703255A true GB703255A (en) | 1954-02-03 |
Family
ID=10129486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1944450A Expired GB703255A (en) | 1950-08-03 | 1950-08-03 | Improvements in electric circuit arrangements for operating low pressure electric discharge lamps having preheatable electrodes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB703255A (en) |
-
1950
- 1950-08-03 GB GB1944450A patent/GB703255A/en not_active Expired
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