GB433769A - Improvements in or relating to installations comprising an electric discharge tube - Google Patents
Improvements in or relating to installations comprising an electric discharge tubeInfo
- Publication number
- GB433769A GB433769A GB12342/35A GB1234235A GB433769A GB 433769 A GB433769 A GB 433769A GB 12342/35 A GB12342/35 A GB 12342/35A GB 1234235 A GB1234235 A GB 1234235A GB 433769 A GB433769 A GB 433769A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- cathode
- current
- tapping
- winding
- 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
- H05B41/40—Controlling the intensity of light discontinuously
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
433,769. Discharge devices. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. April 24, 1935, No. 12342. Convention date, July 30, 1934. [Class 39 (i)] A gas-discharge tube, such as a lamp, is provided with an incandescent cathode and is connected in series with a choke coil, provided with tapping points, and the primary winding of the transformer, which supplies the heating current to the cathode, is connected to the choke coil in such manner that it may be connected in series with a part of the coil to the source of current for the tube. A sodium-vapour lamp 1 is provided with cathodes 2, 3 which are connected to secondary windings 4, 5 of a transformer 6, the primary winding 7 of which has its ends connected respectively to a tapping on a choke coil 10 and to the cathode 3 and terminal 8 of a current source 9. The coil 10 is connected at one end, to the cathode 2, and, at the other end, to the terminal 12 of the source 9 through a tapping. Upon a variation of the supply voltage the tappings are varied to maintain the normal voltage across the primary winding 7 and also the normal discharge current. The winding 7 may be connected permanently to the end 15 of the coil, and the arrangement may be used in cases where the frequency of the supply varies. Further, the winding 7 may be extended to form an autotransformer one end of which is connected through a resistance to a starting electrode. Numerical values are given in the Specification.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE433769X | 1934-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB433769A true GB433769A (en) | 1935-08-20 |
Family
ID=6501814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12342/35A Expired GB433769A (en) | 1934-07-30 | 1935-04-24 | Improvements in or relating to installations comprising an electric discharge tube |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB433769A (en) |
-
1935
- 1935-04-24 GB GB12342/35A patent/GB433769A/en not_active Expired
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