GB650108A - Improvements in and relating to starting circuits for electric discharge lamps - Google Patents
Improvements in and relating to starting circuits for electric discharge lampsInfo
- Publication number
- GB650108A GB650108A GB30945/47A GB3094547A GB650108A GB 650108 A GB650108 A GB 650108A GB 30945/47 A GB30945/47 A GB 30945/47A GB 3094547 A GB3094547 A GB 3094547A GB 650108 A GB650108 A GB 650108A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transformer
- earthed
- lamp
- winding
- starting
- 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
- H05B41/16—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
- H05B41/22—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 having an auxiliary starting electrode
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
650,108. Supply systems for space discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 21, 1947, No. 30945. Convention date, Nov. 22, 1946. Drawings to Specification. [Class 38 (iv)] A starting arrangement for a discharge lamp having thermionic electrodes includes an electrode arranged external to and on or near the surface of the lamp envelope and supplied from an auxiliary winding on the transformer pruviding the lamp discharge current. The transformer is provided with high leakage reactance and the auxiliary winding is so disposed on the transformer core that the voltage of the auxiliary winding is automatically reduced when the main lamp discharge occurs. The electrode' may comprise the support or the reflector for the lamp and connected to the winding through a capacitive coupling and earthed. The transformer may be of the auto type with one point of its winding earthed and with the winding portions supplying respectively the discharge current and starting electrode either side of the earthed point. In a 3-phase system the lamps are connected across the outer portion of the phase windings of a star connected transformer and the starting electrodes are connected to the neutral point, if necessary through a capacitive coupling, and " earthed." The Specification as open to inspection under Sect. 91 comprises also an arrangement whereby a number of lamps may be supplied in parallel through their respective transformers with the starting electrodes connected to a common auto-transformer through a capacitive coupling and " earthed." This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR650108X | 1946-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB650108A true GB650108A (en) | 1951-02-14 |
Family
ID=9003766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB30945/47A Expired GB650108A (en) | 1946-11-22 | 1947-11-21 | Improvements in and relating to starting circuits for electric discharge lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB650108A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1081143B (en) * | 1957-08-21 | 1960-05-05 | Otto Kreutzer | Switching arrangement for operating fluorescent lamps with alternating current from a direct current source |
US4153861A (en) * | 1977-10-17 | 1979-05-08 | Warner Arthur R | Electric discharge tube apparatus |
-
1947
- 1947-11-21 GB GB30945/47A patent/GB650108A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1081143B (en) * | 1957-08-21 | 1960-05-05 | Otto Kreutzer | Switching arrangement for operating fluorescent lamps with alternating current from a direct current source |
US4153861A (en) * | 1977-10-17 | 1979-05-08 | Warner Arthur R | Electric discharge tube apparatus |
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