GB829233A - Improvements in or relating to circuit arrangements for starting and operating heated-cathode electric discharge lamps from an alternating current supply - Google Patents

Improvements in or relating to circuit arrangements for starting and operating heated-cathode electric discharge lamps from an alternating current supply

Info

Publication number
GB829233A
GB829233A GB2052457A GB2052457A GB829233A GB 829233 A GB829233 A GB 829233A GB 2052457 A GB2052457 A GB 2052457A GB 2052457 A GB2052457 A GB 2052457A GB 829233 A GB829233 A GB 829233A
Authority
GB
United Kingdom
Prior art keywords
supply
lamp
starting
capacitor
electric discharge
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
GB2052457A
Inventor
Julius Cates
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2052457A priority Critical patent/GB829233A/en
Publication of GB829233A publication Critical patent/GB829233A/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)

Abstract

829,233. Supply systems for space discharge apparatus. GENERAL ELECTRIC CO. Ltd. June 27, 1958 [June 28, 1957], No. 20524/57. Class 38 (4). A circuit arrangement for starting and operating an electric discharge lamp 5 having heatable cathodes comprises a ballast inductor 8 connected between a supply terminal 1 and a lamp terminal 3, a capacitor 9 being connected in parallel with the discharge path of the lamp 5, so arranged that the inductor 8 and the capacitor 9 are at, or near, resonance at the supply frequency, windings 11, 12 associated with the inductor 8 being provided to supply heater current to the lamp electrodes. A resistor 10 is provided in series with the capacitor 9 to improve the waveform of the supply current, to improve the stability of the lamp discharge and to render the lamp starting voltage less dependent on variations in the frequency of the supply voltage. An earthed conductor 13 is included to facilitate starting. Two or more lamps may be serially connected across the supply terminals 1, 2.
GB2052457A 1957-06-28 1957-06-28 Improvements in or relating to circuit arrangements for starting and operating heated-cathode electric discharge lamps from an alternating current supply Expired GB829233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2052457A GB829233A (en) 1957-06-28 1957-06-28 Improvements in or relating to circuit arrangements for starting and operating heated-cathode electric discharge lamps from an alternating current supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2052457A GB829233A (en) 1957-06-28 1957-06-28 Improvements in or relating to circuit arrangements for starting and operating heated-cathode electric discharge lamps from an alternating current supply

Publications (1)

Publication Number Publication Date
GB829233A true GB829233A (en) 1960-03-02

Family

ID=10147298

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2052457A Expired GB829233A (en) 1957-06-28 1957-06-28 Improvements in or relating to circuit arrangements for starting and operating heated-cathode electric discharge lamps from an alternating current supply

Country Status (1)

Country Link
GB (1) GB829233A (en)

Similar Documents

Publication Publication Date Title
GB1504790A (en) Electric device for starting and supplying a gas and/or vapour discharge lamp
GB829233A (en) Improvements in or relating to circuit arrangements for starting and operating heated-cathode electric discharge lamps from an alternating current supply
GB919753A (en) Circuit arrangement for energizing electric discharge devices
GB897828A (en) A fluorescent lamp operating circuit
GB1485166A (en) Ballast circuit for a gaseous discharge lamp
GB878925A (en) Improvements in or relating to power factor correction circuits for gas discharge lamps
GB574980A (en) Improvements in combinations of electric discharge lamps with means for operating them
GB861181A (en) Improvements in or relating to electric circuit arrangements for starting and operating electric discharge lamps having heatable electrodes
GB830202A (en) Improvements in or relating to circuit arrangem operating electric lamps
GB1019066A (en) Improvements relating to the operation of electric discharge lamps from alternating current supplies
GB828750A (en) Improvements in circuits for electric discharge lamps
GB730024A (en) Improvements in or relating to circuit arrangements for operating electric dischargelamps having heatable electrodes
GB793042A (en) Improvements in or relating to electric circuit arrangements for operating from an alternating current supply one or more electric discharge lamps
GB739045A (en) Improvements in dimming circuits for electric discharge lamps
GB755776A (en) Improvements in or relating to electric circuits for starting and operating fluorescent lamps
GB587660A (en) Circuit arrangements for electric discharge lamps
GB762489A (en) Improvements in or relating to electric circuit arrangements for starting and operating at least one low pressure electric discharge lamp
GB777566A (en) Circuit for electric discharge tubes
GB906888A (en) Improvements in or relating to circuit arrangements for operating electric dischargelamps with alternating current
GB776178A (en) Improvements in or relating to electric circuit arrangements for starting and operating from an alternating current supply at least one low pressure electric discharge lamp provided with heatable electrodes
GB739457A (en) Improvements in or relating to electric circuits for electric discharge lamps
GB869136A (en) Improvements in operating circuits for low-pressure electric discharge lamps
GB816302A (en) Improvements in operating circuits for electric discharge lamps
GB906991A (en) Improvements in or relating to circuit arrangements for starting and operating electric discharge lamps
GB674249A (en) Improvements in or relating to discharge lamp circuits