GB634510A - Improvements in and relating to discharge lamp circuits - Google Patents
Improvements in and relating to discharge lamp circuitsInfo
- Publication number
- GB634510A GB634510A GB915548A GB915548A GB634510A GB 634510 A GB634510 A GB 634510A GB 915548 A GB915548 A GB 915548A GB 915548 A GB915548 A GB 915548A GB 634510 A GB634510 A GB 634510A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- condenser
- current
- primary winding
- transformer
- 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
634,510. Supply systems for discharge lamps. SERNER, A., and CROMPTON PARKINSON, Ltd. April 3, 1947, No. 9155. [Class 38 (iv)] A transformer having two secondary windings S1, S2 for supplying heating current to the individual filamentary electrodes of a discharge lamp D has a primary winding PO connected in series with a condenser C in a non-resonant circuit across the current supply leads. The condenser voltage is effective for starting the lamp and is substantially independent of the voltage drop across the lamp or of the value of the stabilizing ballast LO which is connected in series with the lamp in a circuit in parallel relation with the condenser. When the lamp starts the wattless compound of the lamp current reduces the excitation of the transformer and the current in the electrodes, a second primary winding PX being provided in the arrangement according to Fig. 2 wherein a condenser CX makes the lamp current lead. When such condenser is not used the lamp current is taken through the primary winding PO by a direct connection from an electrode to a point between the condenser C and winding PO. Specification 634,509 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB915548A GB634510A (en) | 1947-04-03 | 1947-04-03 | Improvements in and relating to discharge lamp circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB915548A GB634510A (en) | 1947-04-03 | 1947-04-03 | Improvements in and relating to discharge lamp circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB634510A true GB634510A (en) | 1950-03-22 |
Family
ID=9866449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB915548A Expired GB634510A (en) | 1947-04-03 | 1947-04-03 | Improvements in and relating to discharge lamp circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB634510A (en) |
-
1947
- 1947-04-03 GB GB915548A patent/GB634510A/en not_active Expired
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