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GB1019863A - Fluorescent lamp circuits - Google Patents

Fluorescent lamp circuits

Info

Publication number
GB1019863A
GB1019863A GB2413464A GB2413464A GB1019863A GB 1019863 A GB1019863 A GB 1019863A GB 2413464 A GB2413464 A GB 2413464A GB 2413464 A GB2413464 A GB 2413464A GB 1019863 A GB1019863 A GB 1019863A
Authority
GB
United Kingdom
Prior art keywords
lamp
coils
wound
series
primary
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
GB2413464A
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.)
EMI Group 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 GB2413464A priority Critical patent/GB1019863A/en
Priority to DE1965T0019257 priority patent/DE1963862U/en
Publication of GB1019863A publication Critical patent/GB1019863A/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

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,019,863. Supply systems for gas discharge apparatus. THORN ELECTRICAL INDUSTRIES Ltd. June 10, 1964, No. 24134/64. Heading H2H. [Also in Division H1] A circuit arrangement of the semi-resonant type for the operation of electric discharge lamps includes a ballast unit having two primary windings P1, P2 connected in series between a supply terminal 10 and a filament 12 of the lamp 13 and two secondary windings S1, S2 connected in series with a capacitor C between the two filaments 12, 14 of the lamp.' The primary and secondary windings are wound on a four-limbed core 15, 16 having air gaps between the limbs. The reactance values of the components are such that the circuit develops the necessary starting voltage and after ignition of the lamp the voltage is reduced to the normal operating value. The coils P1, S1 may be wound on a common former as may be the coils P2, S2.
GB2413464A 1964-06-10 1964-06-10 Fluorescent lamp circuits Expired GB1019863A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2413464A GB1019863A (en) 1964-06-10 1964-06-10 Fluorescent lamp circuits
DE1965T0019257 DE1963862U (en) 1964-06-10 1965-06-05 CIRCUIT DEVICE FOR STARTERLESS IGNITION OF GAS DISCHARGE LAMPS WITH PREHEATABLE ELECTRODES.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2413464A GB1019863A (en) 1964-06-10 1964-06-10 Fluorescent lamp circuits

Publications (1)

Publication Number Publication Date
GB1019863A true GB1019863A (en) 1966-02-09

Family

ID=10206925

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2413464A Expired GB1019863A (en) 1964-06-10 1964-06-10 Fluorescent lamp circuits

Country Status (2)

Country Link
DE (1) DE1963862U (en)
GB (1) GB1019863A (en)

Also Published As

Publication number Publication date
DE1963862U (en) 1967-07-13

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