GB601360A - Improvements in and relating to starting arrangements for electric discharge devices - Google Patents
Improvements in and relating to starting arrangements for electric discharge devicesInfo
- Publication number
- GB601360A GB601360A GB31025/45A GB3102545A GB601360A GB 601360 A GB601360 A GB 601360A GB 31025/45 A GB31025/45 A GB 31025/45A GB 3102545 A GB3102545 A GB 3102545A GB 601360 A GB601360 A GB 601360A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gap
- circuit
- discharge
- spark
- lamps
- 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
601,360. Control systems for discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 19, 1945, No. 31025. Convention date, Nov. 21, 1944. [Class 38 (iv)] A starting circuit connected in parallel with the discharge gap of a fluorescent tube or discharge device having an ionizable atmosphere, with or without thermionic electrodes, comprises an impedance 16 in series with a loop circuit of a condenser 14 and spark-gap 15, the loop circuit being inductively coupled with the discharge circuit. The spark-gap preferably has a breakdown voltage less than the open circuit voltage of the supply and a maintaining voltage less than that across the discharge lamp when operating. Upon energization by A.C. or D.C., the condenser 14 is charged until the spark-gap breaks down and a high-frequency impulse is induced in the lamp circuit. Fig. 1 shows two lamps 1 on A.C. with lead and lag circuits supplied from a step-up autotransformer 7. Modifications providing also a degree of electrode pre-heating employ separate secondary windings for heating each electrode on the transformer 18, 19 or on a transformer in the starting circuit. The lamps of Specifications 436,469, 545,935, 559,898 and 569,685, [Group XL], are referred to. The spark-gap may be furnished by electrodes 22, Fig. 2, with opposing flat surfaces and of barium-activated nickeltungsten in a moderately low-pressure gas. " Dark effect " alternations of breakdown voltage are obviated by aluminium paint 24 as in Specification 556,428.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US601360XA | 1944-11-21 | 1944-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB601360A true GB601360A (en) | 1948-05-04 |
Family
ID=22027589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31025/45A Expired GB601360A (en) | 1944-11-21 | 1945-11-19 | Improvements in and relating to starting arrangements for electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB601360A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1199399B (en) * | 1962-04-09 | 1965-08-26 | Edgar Frank | Circuit arrangement for starting gas discharge lamps without a starter |
-
1945
- 1945-11-19 GB GB31025/45A patent/GB601360A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1199399B (en) * | 1962-04-09 | 1965-08-26 | Edgar Frank | Circuit arrangement for starting gas discharge lamps without a starter |
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