GB793042A - Improvements in or relating to electric circuit arrangements for operating from an alternating current supply one or more electric discharge lamps - Google Patents
Improvements in or relating to electric circuit arrangements for operating from an alternating current supply one or more electric discharge lampsInfo
- Publication number
- GB793042A GB793042A GB2362154A GB2362154A GB793042A GB 793042 A GB793042 A GB 793042A GB 2362154 A GB2362154 A GB 2362154A GB 2362154 A GB2362154 A GB 2362154A GB 793042 A GB793042 A GB 793042A
- Authority
- GB
- United Kingdom
- Prior art keywords
- supply
- circuit
- lamp
- capacitor
- electrode
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
- C10G11/04—Oxides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
- C10G11/04—Oxides
- C10G11/05—Crystalline alumino-silicates, e.g. molecular sieves
-
- 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
- H05B41/2325—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 provided with pre-heating electrodes
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
793,042. Supply circuits for space discharge lamps. GENERAL ELECTRIC CO., Ltd. Nov. 14, 1955 [Aug. 13, 1954], No. 23621/54. Addition to 730,024. Class 38 (4). An electric circuit for starting and operating from an A.C. supply a L.P. discharge lamp 8 having a pair of heatable electrodes 6, 7, which circuit is an improvement in or modification of that defined by Claim 1 of the parent Specification which is referred to, comprises a pair of input terminals of which one, 1, is connected to one lamp electrode 6 through the primary winding 3 of an electrode-heating transformer 4 and a magnetically separate lamp ballast inductor 5 connected in series in that order, the transformer having a secondary winding 9 connected across the electrode 6 to supply current thereto, while the other lamp electrode 7 is connected across the input terminals 1, 2, for the supply of heating current, in a series circuit which includes the primary winding 3 and a capacitor 10, the latter being connected between the winding 3 and the electrode 7 ; the capacitance of capacitor 10 is such that the circuit has a P.F. which is leading, unity, or a lagging P.F. of not less than 0.7 when operating from an A.C. supply of substantially sinusoidal waveform and the arrangement is such that in operation the voltage across the capacitor 10 does not substantially exceed the supply voltage. Starting of the lamp may be facilitated by an earthed starting strip or earthed metal plate forming part of the lamp fitting, not shown, by providing that the switch, not shown, by which the circuit is made closes a number of times during each operation in order to find a vavourable value of the supply voltage alternation, by connecting the capacitor 10 to a tapping point on the inductor 5 instead of to the interconnection point 11 in order that on connection of the supply the capacitor charging current causes a voltage pulse which is stepped-up by auto-transformer action in the inductor. The circuit may be modified to supply a plurality of lamps in series, by providing on the transformer 4 further secondary windings which are connected to the intermediate electrodes in the series chain. The Provisional Specification describes a circuit for supplying a plurality of lamps connected in parallel. Specification 533,843 also is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2362154A GB793042A (en) | 1954-08-13 | 1954-08-13 | Improvements in or relating to electric circuit arrangements for operating from an alternating current supply one or more electric discharge lamps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2362154A GB793042A (en) | 1954-08-13 | 1954-08-13 | Improvements in or relating to electric circuit arrangements for operating from an alternating current supply one or more electric discharge lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB793042A true GB793042A (en) | 1958-04-09 |
Family
ID=10198618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2362154A Expired GB793042A (en) | 1954-08-13 | 1954-08-13 | Improvements in or relating to electric circuit arrangements for operating from an alternating current supply one or more electric discharge lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB793042A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3040208A (en) * | 1960-09-20 | 1962-06-19 | Advance Transformer Co | Ballast apparatus for gaseous discharge devices |
-
1954
- 1954-08-13 GB GB2362154A patent/GB793042A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3040208A (en) * | 1960-09-20 | 1962-06-19 | Advance Transformer Co | Ballast apparatus for gaseous discharge devices |
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