GB715693A - Improvements in or relating to circuit arrangements for operating low pressure electric discharge lamps - Google Patents
Improvements in or relating to circuit arrangements for operating low pressure electric discharge lampsInfo
- Publication number
- GB715693A GB715693A GB1800651A GB1800651A GB715693A GB 715693 A GB715693 A GB 715693A GB 1800651 A GB1800651 A GB 1800651A GB 1800651 A GB1800651 A GB 1800651A GB 715693 A GB715693 A GB 715693A
- Authority
- GB
- United Kingdom
- Prior art keywords
- group
- dimming
- electric discharge
- secondary winding
- 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
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
Landscapes
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
715,693. Supply systems for space discharge devices; transformer arrangements. GENERAL ELECTRIC CO., Ltd., and WILLIAMS, C. E. July 29, 1952 [July 30, 1951], No. 18006/51. Class 38(4) A dimming circuit arrangement for a plurality of hot or cold cathode electric discharge lamps comprises a first group of two or more transformers 1, 2 whose primary windings 3, 4 are serially connected with each other and with a dimming impedance 5 to constant voltage A.C. supply terminals 6, 7, a second group of two or more transformers 8, 9 whose primary windings 10, 11 are similarly connected and are therefore in parallel with those of the first group, the secondary winding 12, 13 of each first group transformer being connected in series with both a secondary winding 14, 15 of a second group transformer and one or more series connected lamps 16, 17, and the induced voltages in each such secondary circuit being additive to one another. The dimming impedance 5 may be a variable resistor, and one side of each secondary winding may be earthed. If the lamps are of the hot cathode type, electrode heating arrangements are provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1800651A GB715693A (en) | 1951-07-30 | 1951-07-30 | Improvements in or relating to circuit arrangements for operating low pressure electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1800651A GB715693A (en) | 1951-07-30 | 1951-07-30 | Improvements in or relating to circuit arrangements for operating low pressure electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB715693A true GB715693A (en) | 1954-09-22 |
Family
ID=10105006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1800651A Expired GB715693A (en) | 1951-07-30 | 1951-07-30 | Improvements in or relating to circuit arrangements for operating low pressure electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB715693A (en) |
-
1951
- 1951-07-30 GB GB1800651A patent/GB715693A/en not_active Expired
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