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 lamps

Info

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
Application number
GB2362154A
Inventor
Julius Cates
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2362154A priority Critical patent/GB793042A/en
Publication of GB793042A publication Critical patent/GB793042A/en
Expired legal-status Critical Current

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

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.
GB2362154A 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 Expired GB793042A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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