GB652426A - Improvements in apparatus for operating electrical discharge devices - Google Patents
Improvements in apparatus for operating electrical discharge devicesInfo
- Publication number
- GB652426A GB652426A GB5597/48A GB559748A GB652426A GB 652426 A GB652426 A GB 652426A GB 5597/48 A GB5597/48 A GB 5597/48A GB 559748 A GB559748 A GB 559748A GB 652426 A GB652426 A GB 652426A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- choke
- electrodes
- transformer
- supply
- 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
652,426. Supply systems for space discharge lamps. GUARDIAN ELECTRIC MANUFACTURING CO. Feb. 25, 1948, No. 5597. Convention date, Oct. 12, 1939. [Class 38 (iv)] A circuit arrangement for a discharge lamp 10 having filamentary electrodes 11, 12, which provides a high starting voltage across the electrodes and automatic reduction of heating current to the electrodes whilst the lamp is operating, comprises a swinging choke 16 included in one of the supply leads to the lamp electrodes and a heating transformer 18 comprising two secondary windings 20, 21 connected to the respective electrodes and a primary winding 19 connected at one end to a tapping 24 on the choke 16 and at the other in series with the secondary winding 20 to that supply lead 14 connecting the electrode 11 direct to a supply terminal, the core cross-section of the transformer being substantially greater than that of the choke so that during preheating the choke functions as an auto-transformer to provide the high voltage across the lamp, and upon initiation of the lamp discharge the voltage drop increases across that portion of the choke remote from the lamp to lower the heating current. A condenser may be shunted across the lamp to facilitate starting and the transformer and choke may be loosely coupled.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US652426XA | 1939-10-12 | 1939-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB652426A true GB652426A (en) | 1951-04-25 |
Family
ID=22061332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5597/48A Expired GB652426A (en) | 1939-10-12 | 1948-02-25 | Improvements in apparatus for operating electrical discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB652426A (en) |
-
1948
- 1948-02-25 GB GB5597/48A patent/GB652426A/en not_active Expired
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