GB594626A - Improvements in and relating to circuits for electric discharge lamps - Google Patents
Improvements in and relating to circuits for electric discharge lampsInfo
- Publication number
- GB594626A GB594626A GB1676645A GB1676645A GB594626A GB 594626 A GB594626 A GB 594626A GB 1676645 A GB1676645 A GB 1676645A GB 1676645 A GB1676645 A GB 1676645A GB 594626 A GB594626 A GB 594626A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- primary
- secondary windings
- stampings
- separated
- 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
- 238000004804 winding Methods 0.000 abstract 5
- 230000004907 flux Effects 0.000 abstract 3
- 210000003414 Extremities Anatomy 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- FDPIMWZHGJNESB-VCSXYVMHSA-N (2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S,3S)-2-[[(2S)-1-[(2S)-2-[[(2S)-2-[[(2S)-6-amino-2-[[(2S)-2-[[(2S)-2-[[(2R)-2-[[(2S)-2-amino-3-methylbutanoyl]amino]-3-sulfanylpropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-carboxypropanoyl]amino]hexanoyl]ami Chemical compound C([C@@H](C(=O)N1CCC[C@H]1C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@@H](CC=1NC=NC=1)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCCN=C(N)N)C(O)=O)NC(=O)[C@H](CO)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CC=1C=CC(O)=CC=1)NC(=O)[C@H](CS)NC(=O)[C@@H](N)C(C)C)C1=CC=CC=C1 FDPIMWZHGJNESB-VCSXYVMHSA-N 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000006011 modification reaction Methods 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
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
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
- H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
- H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
- H05B41/232—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
Landscapes
- Ac-Ac Conversion (AREA)
Abstract
594,626. Supply systems for space discharge apparatus; transformers. GENERAL ELECTRIC CO., Ltd., and CATES, J. July 2, 1945, No. 16766. [Classes 38 (ii) and 38 (iv)] An electric discharge lamp 10, Fig. 1, has terminals 11, 12 connected through a condenser 13 between output terminal of a stray field transformer energized at terminals 17, 18. The transformer may comprise primary and secondary windings 21, 22 mounted on a central limb 23, Fig. 2, of a shell-type core, and has a flux leakage path between them provided by iron stampings 24 separated from the main core by air gaps 25 and an additional air gap 26 is provided in the path of the flux linking the secondary winding. In a modified form, Fig. 3, two E-shaped cores 30, 31 are used and are separated by non-magnetic material 32 to provide the air gap in the path of the flux linking the secondary winding 22. In a further modification, Fig. 4, the transformer comprises two approximately U-shaped cores 33, 34 preferably provided with two secondary windings 22 and 22<1> and two primary windings 21 and 21<1> respectively. Stampings 24 are provided between the limbs of core 34 and an air gap 35, between the two cores as shown. The primary and secondary windings 21, 21<1> and 22, 22<1> may be connected as an autotransformer. In an arrangement for operating an additional lamp 10<1>, Fig. 5, in a purely inductive circuit, the transformer of Fig. 2 is modified as shown in Fig. 6; two secondary windings 38, 39 being disposed on either side of a primary winding 37 and separated from it by stampings 41, 42. The secondary winding 38 may be connected to a tapping on the primary winding 37 in order to obtain substantially equal open circuit voltages from both secondaries. Each of the foregoing arrangements is applicable to hot or cold cathode discharge lamps and in each case the stray field transformer may be double wound.
Publications (1)
Publication Number | Publication Date |
---|---|
GB594626A true GB594626A (en) | 1947-11-14 |
Family
ID=1732564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1676645A Expired GB594626A (en) | 1945-07-02 | Improvements in and relating to circuits for electric discharge lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB594626A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2593651A (en) * | 1950-01-20 | 1952-04-22 | Hanovia Chemical & Mfg Co | Wattage control system for vapor arc lamps |
US2665406A (en) * | 1946-04-01 | 1954-01-05 | Carmichael Thomas Frazer | High power factor current limiter |
US2813228A (en) * | 1951-05-17 | 1957-11-12 | Advance Transformer Co | Circuit for starting and operating gaseous discharge devices |
US2959712A (en) * | 1955-11-24 | 1960-11-08 | Philips Corp | Voltage-compensating circuit arrangement |
US3629650A (en) * | 1968-11-21 | 1971-12-21 | Patrick And Drew Ltd | Method and apparatus for operating a gas discharge tube |
WO2003010876A2 (en) * | 2001-07-20 | 2003-02-06 | Thomson Licensing S.A. | Power factor correction circuit with a coil |
-
1945
- 1945-07-02 GB GB1676645A patent/GB594626A/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2665406A (en) * | 1946-04-01 | 1954-01-05 | Carmichael Thomas Frazer | High power factor current limiter |
US2593651A (en) * | 1950-01-20 | 1952-04-22 | Hanovia Chemical & Mfg Co | Wattage control system for vapor arc lamps |
US2813228A (en) * | 1951-05-17 | 1957-11-12 | Advance Transformer Co | Circuit for starting and operating gaseous discharge devices |
US2959712A (en) * | 1955-11-24 | 1960-11-08 | Philips Corp | Voltage-compensating circuit arrangement |
US3629650A (en) * | 1968-11-21 | 1971-12-21 | Patrick And Drew Ltd | Method and apparatus for operating a gas discharge tube |
WO2003010876A2 (en) * | 2001-07-20 | 2003-02-06 | Thomson Licensing S.A. | Power factor correction circuit with a coil |
WO2003010876A3 (en) * | 2001-07-20 | 2003-08-07 | Thomson Licensing Sa | Power factor correction circuit with a coil |
US7002320B2 (en) | 2001-07-20 | 2006-02-21 | Thomson Licensing S.A. | Power factor correction circuit with a coil |
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