GB551487A - Improvements in circuit arrangements for operating electric discharge lamps - Google Patents

Improvements in circuit arrangements for operating electric discharge lamps

Info

Publication number
GB551487A
GB551487A GB1073641A GB1073641A GB551487A GB 551487 A GB551487 A GB 551487A GB 1073641 A GB1073641 A GB 1073641A GB 1073641 A GB1073641 A GB 1073641A GB 551487 A GB551487 A GB 551487A
Authority
GB
United Kingdom
Prior art keywords
electric discharge
discharge lamps
lamp
circuit arrangements
operating electric
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
GB1073641A
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.)
GORDON TREMELLING GRAPES
British Thomson Houston Co Ltd
Original Assignee
GORDON TREMELLING GRAPES
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 GORDON TREMELLING GRAPES, British Thomson Houston Co Ltd filed Critical GORDON TREMELLING GRAPES
Priority to GB1073641A priority Critical patent/GB551487A/en
Publication of GB551487A publication Critical patent/GB551487A/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
    • 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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

551,487. Electricity supply to electric discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., and GRAPES, G. T. Aug. 22, 1941, No. 10736. [Class 38 (iv)] The current flow through a discharge lamp L is controlled without appreciably affecting the stability of the discharge by connecting the lamp across a semi-resonant circuit, consisting of series inductance Li and shunt condenser C, and including in the lamp circuit itself a series variable resistance R or variable inductance. In the circuit shown, a fixed series inductance Li and variable resistance R are employed.
GB1073641A 1941-08-22 1941-08-22 Improvements in circuit arrangements for operating electric discharge lamps Expired GB551487A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1073641A GB551487A (en) 1941-08-22 1941-08-22 Improvements in circuit arrangements for operating electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1073641A GB551487A (en) 1941-08-22 1941-08-22 Improvements in circuit arrangements for operating electric discharge lamps

Publications (1)

Publication Number Publication Date
GB551487A true GB551487A (en) 1943-02-24

Family

ID=9973344

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1073641A Expired GB551487A (en) 1941-08-22 1941-08-22 Improvements in circuit arrangements for operating electric discharge lamps

Country Status (1)

Country Link
GB (1) GB551487A (en)

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