GB662977A - Improvements in or relating to circuit arrangements for discharge lamps - Google Patents
Improvements in or relating to circuit arrangements for discharge lampsInfo
- Publication number
- GB662977A GB662977A GB1047949A GB1047949A GB662977A GB 662977 A GB662977 A GB 662977A GB 1047949 A GB1047949 A GB 1047949A GB 1047949 A GB1047949 A GB 1047949A GB 662977 A GB662977 A GB 662977A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- capacitance
- primary
- discharge
- primary winding
- 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
662,977. Supply systems for space discharge lamps. CROMPTON PARKINSON, Ltd. April 19, 1950 [April 20, 1949], No. 10479/49. Class 38 (iv). Automatic reduction of the heating current supplied to the filamentary electrodes of a discharge lamp 3, upon initiation of the lamp discharge, is obtained by supplying the primary 1 of the heating transformer through a capacitance 2 and connecting the lamp through a ballast impedance 4 across the capacitance and part only of the transformer primary so that when preheating the electrodes the transformer primary carries the capacitance current and upon the lamp discharge being initiated part of the primary winding also carries the lamp current, the phase difference between the two currents resulting in reduction of the preheating current supplied by secondary windings 5, 6. Provision may be made for varying the proportion of the primary winding in parallel with the lamp by, for example, adjustable tappings on the primary winding. The capacitance need be no greater than that normally required for power factor correction purposes. Specification 634,510 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1047949A GB662977A (en) | 1949-04-20 | 1949-04-20 | Improvements in or relating to circuit arrangements for discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1047949A GB662977A (en) | 1949-04-20 | 1949-04-20 | Improvements in or relating to circuit arrangements for discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB662977A true GB662977A (en) | 1951-12-12 |
Family
ID=9968608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1047949A Expired GB662977A (en) | 1949-04-20 | 1949-04-20 | Improvements in or relating to circuit arrangements for discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB662977A (en) |
-
1949
- 1949-04-20 GB GB1047949A patent/GB662977A/en not_active Expired
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