GB856773A - Improvements in and relating to gaseous discharge lamp circuits - Google Patents

Improvements in and relating to gaseous discharge lamp circuits

Info

Publication number
GB856773A
GB856773A GB3087458A GB3087458A GB856773A GB 856773 A GB856773 A GB 856773A GB 3087458 A GB3087458 A GB 3087458A GB 3087458 A GB3087458 A GB 3087458A GB 856773 A GB856773 A GB 856773A
Authority
GB
United Kingdom
Prior art keywords
circuit
capacitor
lamp
transformer
series
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
GB3087458A
Inventor
Donald Frederick Chapman
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.)
Thorn Electrical Industries Ltd
Original Assignee
Thorn Electrical Industries Ltd
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 Thorn Electrical Industries Ltd filed Critical Thorn Electrical Industries Ltd
Priority to GB3087458A priority Critical patent/GB856773A/en
Publication of GB856773A publication Critical patent/GB856773A/en
Expired legal-status Critical Current

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
    • H05B41/23—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

856,773. Supply systems for space-discharge apparatus. THORN ELECTRICAL INDUSTRIES Ltd. Sept. 10, 1959 [Sept. 26, 1958], No. 30874/58. Class 38 (4). A gaseous discharge lamp circuit arrangement having improved starting facilities includes A.C. mains supply terminals N, L across which are connected two circuits: a first circuit comprising a transformer primary 2-3 and a choke G connected in series; a second circuit comprising a first filament A of lamp F, a first transformer secondary 1-2 and a capacitor C. The circuit arrangement is completed by a third circuit comprising the second transformer secondary 3-4 connected in series with the second filament B of lamp F. On switching terminals N, L into the A.C. supply, a momentary surge of current occurs through the second circuit whilst capacitor C is charging up, resulting in the application across the lamp of a high-voltage ionizing pulse for assisting starting. Another embodiment includes a tapped choke G and a discharge resistor connected across capacitor C. Further embodiments differ in the connectionpoint of the choke to the transformer, and in the connections between the capacitor C, secondary 1-2 and filament A, but in all the capacitor, secondary and filament form a series circuit between the terminals L, N. The circuit may be adapted to feed a plurality of lamps in series, by providing the transformer with further isolated secondary windings for supplying the intermediate lamp filaments.
GB3087458A 1958-09-26 1958-09-26 Improvements in and relating to gaseous discharge lamp circuits Expired GB856773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3087458A GB856773A (en) 1958-09-26 1958-09-26 Improvements in and relating to gaseous discharge lamp circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3087458A GB856773A (en) 1958-09-26 1958-09-26 Improvements in and relating to gaseous discharge lamp circuits

Publications (1)

Publication Number Publication Date
GB856773A true GB856773A (en) 1960-12-21

Family

ID=10314476

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3087458A Expired GB856773A (en) 1958-09-26 1958-09-26 Improvements in and relating to gaseous discharge lamp circuits

Country Status (1)

Country Link
GB (1) GB856773A (en)

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