GB421783A - Improvements in and relating to electric discharge lamps - Google Patents
Improvements in and relating to electric discharge lampsInfo
- Publication number
- GB421783A GB421783A GB16711/34A GB1671134A GB421783A GB 421783 A GB421783 A GB 421783A GB 16711/34 A GB16711/34 A GB 16711/34A GB 1671134 A GB1671134 A GB 1671134A GB 421783 A GB421783 A GB 421783A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- resistance
- electrodes
- june
- alternating
- 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
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/391—Controlling the intensity of light continuously using saturable magnetic devices
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
421,783. Discharge lamps. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London. June 5, 1934, No. 16711. Convention date, June 7, 1933. [Class 39 (i)] A lamp having either a solid or liquid cathode has an auxiliary electrode between the main electrodes and connected to one of them through a capacitor, and means are provided, responsive to a discharge of the capacitor, for producing a voltage impulse between the electrodes. In one form, Fig. 1, a ring- shaped auxiliary electrode 12 is connected to the cathode 4 through a winding 13 and a capacity 15 which is charged from the mains 6, 7 through a resistance 14. The capacity 15 discharges between the electrodes 12 and 4 and a voltage surge is produced in winding 9 in the anode lead. The winding 9 and a resistance 10 serve as ballast impedance. Varying the resistance 14 controls the light intensity of the tube when an alternating- current supply is used. In a modification for use on alternating-current supply only the condenser 15 is charged through a phase controller which is varied to produce variations in illumination. The filling may comprise mercury or sodium or neon or krypton or mixtures thereof. Dimensions of a typical lamp are given. Specification 252,408, [Class 39 (i)], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US421783XA | 1933-06-07 | 1933-06-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB421783A true GB421783A (en) | 1934-12-31 |
Family
ID=21920465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16711/34A Expired GB421783A (en) | 1933-06-07 | 1934-06-05 | Improvements in and relating to electric discharge lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB421783A (en) |
-
1934
- 1934-06-05 GB GB16711/34A patent/GB421783A/en not_active Expired
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