GB617354A - Improvements relating to the control of electric discharge lamps - Google Patents
Improvements relating to the control of electric discharge lampsInfo
- Publication number
- GB617354A GB617354A GB1847346A GB1847346A GB617354A GB 617354 A GB617354 A GB 617354A GB 1847346 A GB1847346 A GB 1847346A GB 1847346 A GB1847346 A GB 1847346A GB 617354 A GB617354 A GB 617354A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- transformer
- heating
- choke
- discharge 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
- H05B41/391—Controlling the intensity of light continuously using saturable magnetic devices
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
617,354. Control systems for space-discharge lamps. STURDY ELECTRIC CO., Ltd., LARK, G. T. K., and DAVIE, R. B. June 19, 1946, No. 18473. [Class 38 (iv)] Space-discharge lamps having filamentary electrodes are provided with means such as a variable reactor or resistor whereby the discharge current can be controlled at will and the lamp dimmed, and with means whereby the current heating the electrodes falls with increasing lamp current and vice versa. The dimming means may be according to Specification 602,211. Fig. 1 shows an arrangement in which a choke 12 in series with a transformer 1 furnishing the igniting voltage and heating current is variably saturable by a winding 14 controlled by a resistance 16 in a D.C. circuit; the transformer may step up the voltage for the electrodes. Fig. 3 shows another form wherein the electrode heating currents are bucked by windings 22, 23 on the choke and in series with heating windings on the transformer; the choke saturating current is derived from the same transformer. The striking of the lamp is preferably assisted by housing it in an earthed metal fitting.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1847346A GB617354A (en) | 1946-06-19 | 1946-06-19 | Improvements relating to the control of electric discharge lamps |
| ES0178496A ES178496A1 (en) | 1946-06-19 | 1947-06-17 | A CONTROL DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1847346A GB617354A (en) | 1946-06-19 | 1946-06-19 | Improvements relating to the control of electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB617354A true GB617354A (en) | 1949-02-04 |
Family
ID=10113030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1847346A Expired GB617354A (en) | 1946-06-19 | 1946-06-19 | Improvements relating to the control of electric discharge lamps |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES178496A1 (en) |
| GB (1) | GB617354A (en) |
-
1946
- 1946-06-19 GB GB1847346A patent/GB617354A/en not_active Expired
-
1947
- 1947-06-17 ES ES0178496A patent/ES178496A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES178496A1 (en) | 1947-08-01 |
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