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GB749216A - Improvements in and relating to circuit arrangements for electric discharge tubes - Google Patents

Improvements in and relating to circuit arrangements for electric discharge tubes

Info

Publication number
GB749216A
GB749216A GB10236/54A GB1023654A GB749216A GB 749216 A GB749216 A GB 749216A GB 10236/54 A GB10236/54 A GB 10236/54A GB 1023654 A GB1023654 A GB 1023654A GB 749216 A GB749216 A GB 749216A
Authority
GB
United Kingdom
Prior art keywords
resistor
tube
electric discharge
april
discharge tubes
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
GB10236/54A
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
Publication of GB749216A publication Critical patent/GB749216A/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

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

749,216. Supply systems for space discharge tubes. BRITISH THOMSON-HOUSTON CO., Ltd. April 7, 1954 [April 8, 1953], No. 10236/54. Class 38 (4). In a circuit arrangement for an electric discharge tube 1, e.g. a fluorescent lamp, the circuit being as described in Specification 742,356, there is provided a resistor 7 serially connected with the tube shunting inductance 4 and having such resistance value, thermal capacity, and positive temperature coefficient of resistance as not to influence normal starting and running of the tube but to increase its resistance value sufficiently to limit the current through the inductance 4 to a permissible value when failure of the tube to ignite causes a heavier current to flow through the resistor for a longer period resulting in the resistor attaining a prodetermined higher temperature. The resistor may be of a nickel-base alloy wire wound in heat exchange relation upon a body of glass fibres to retard the heating of the wire.
GB10236/54A 1953-04-08 1954-04-07 Improvements in and relating to circuit arrangements for electric discharge tubes Expired GB749216A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR749216X 1953-04-08

Publications (1)

Publication Number Publication Date
GB749216A true GB749216A (en) 1956-05-23

Family

ID=9148923

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10236/54A Expired GB749216A (en) 1953-04-08 1954-04-07 Improvements in and relating to circuit arrangements for electric discharge tubes

Country Status (1)

Country Link
GB (1) GB749216A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126992B (en) * 1957-06-05 1962-04-05 Engelhard Hanovia Inc Circuit arrangement for lighting and operating high-pressure gas discharge lamps
DE2552981A1 (en) * 1974-12-05 1976-06-16 Philips Nv ELECTRICAL ARRANGEMENT FOR IGNITING AND FEEDING A GAS AND / OR STEAM DISCHARGE LAMP

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126992B (en) * 1957-06-05 1962-04-05 Engelhard Hanovia Inc Circuit arrangement for lighting and operating high-pressure gas discharge lamps
DE2552981A1 (en) * 1974-12-05 1976-06-16 Philips Nv ELECTRICAL ARRANGEMENT FOR IGNITING AND FEEDING A GAS AND / OR STEAM DISCHARGE LAMP

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