GB540874A - Improvements in circuit arrangements for gaseous electric discharge devices - Google Patents
Improvements in circuit arrangements for gaseous electric discharge devicesInfo
- Publication number
- GB540874A GB540874A GB15629/40A GB1562940A GB540874A GB 540874 A GB540874 A GB 540874A GB 15629/40 A GB15629/40 A GB 15629/40A GB 1562940 A GB1562940 A GB 1562940A GB 540874 A GB540874 A GB 540874A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- switch
- oct
- resistor
- discharge
- 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
- H05B41/02—Details
- H05B41/04—Starting switches
- H05B41/10—Starting switches magnetic only
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
540,874. Electric supply to discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 24, 1940, No. 15629. Convention date, Oct. 24, 1939. [Class 38 (iv)] [Also in Group XL] The A.C. supply to a discharge lamp is, at first, through a resistor 9 (e.g. a filament lamp) through the upper thermionic electrode 2 and through the normally closed contacts of an electromagnetic switch 10, the operating coil of which is energized in accordance with the voltage across the resistor by current through a rectifier 12. When the electrodes are sufficiently heated the voltage across the lamp which increases as it becomes heated (it may have the same type of filament as the electrode so as to ensure similar resistance-temperature characteristics, becomes adequate to open the switch ; the resulting "kick" in the conductive supply circuit serves to start the lamp, the switch being maintained open by the discharge current.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US540874XA | 1939-10-24 | 1939-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB540874A true GB540874A (en) | 1941-11-03 |
Family
ID=21988717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15629/40A Expired GB540874A (en) | 1939-10-24 | 1940-10-24 | Improvements in circuit arrangements for gaseous electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB540874A (en) |
-
1940
- 1940-10-24 GB GB15629/40A patent/GB540874A/en not_active Expired
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