GB849947A - Improvements relating to control circuits for electric discharge lamps - Google Patents

Improvements relating to control circuits for electric discharge lamps

Info

Publication number
GB849947A
GB849947A GB1045858A GB1045858A GB849947A GB 849947 A GB849947 A GB 849947A GB 1045858 A GB1045858 A GB 1045858A GB 1045858 A GB1045858 A GB 1045858A GB 849947 A GB849947 A GB 849947A
Authority
GB
United Kingdom
Prior art keywords
lamp
electric discharge
discharge lamps
control circuits
improvements relating
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
GB1045858A
Inventor
Maurice George Clarke
Kenneth Arthur Eburn Salmon
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB1045858A priority Critical patent/GB849947A/en
Publication of GB849947A publication Critical patent/GB849947A/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
    • H05B41/22—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

849,947. Supply systems for discharge lamps. BRITISH THOMSON-HOUSTON CO. Ltd. March 26, 1959 [April 1, 1958], No. 10458/58. Class 38 (4). In order to facilitate the starting of an electric discharge lamp 1 the potential gradient between one of the lamp electrodes 2 and an earthed metal starting electrode 3 is increased by connecting the starting electrode 3 to the junction between a half-wave rectifier 7 and a capacitor 8, which are serially connected in shunt with the lamp discharge path. A leak resistor 10 may be connected across the capacitor 8. The lamp may be provided with heatable electrodes. The lamp fitting may be used for the metal starting electrode.
GB1045858A 1958-04-01 1958-04-01 Improvements relating to control circuits for electric discharge lamps Expired GB849947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1045858A GB849947A (en) 1958-04-01 1958-04-01 Improvements relating to control circuits for electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1045858A GB849947A (en) 1958-04-01 1958-04-01 Improvements relating to control circuits for electric discharge lamps

Publications (1)

Publication Number Publication Date
GB849947A true GB849947A (en) 1960-09-28

Family

ID=9968235

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1045858A Expired GB849947A (en) 1958-04-01 1958-04-01 Improvements relating to control circuits for electric discharge lamps

Country Status (1)

Country Link
GB (1) GB849947A (en)

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