GB707318A - Improvements in and relating to starting and operating circuits for high pressure gaseous discharge devices - Google Patents

Improvements in and relating to starting and operating circuits for high pressure gaseous discharge devices

Info

Publication number
GB707318A
GB707318A GB26560/51A GB2656051A GB707318A GB 707318 A GB707318 A GB 707318A GB 26560/51 A GB26560/51 A GB 26560/51A GB 2656051 A GB2656051 A GB 2656051A GB 707318 A GB707318 A GB 707318A
Authority
GB
United Kingdom
Prior art keywords
resistor
lamp
high pressure
inductor
starting
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
GB26560/51A
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 GB707318A publication Critical patent/GB707318A/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
    • H05B41/231—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 high-pressure lamps

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

707,318. Supply system for space discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 13, 1951 [Nov. 13, 1950], No. 26560/51. Class 38 (4) To 'limit the discharge current on initiation of the arc when the arc volt drop is low, a resistor 7 exhibiting a negative temperature coefficient of resistance at and below a predetermined temperature which is not higher than that of the steady operating condition and a positive coefficient above such predetermined temperature, is provided in the series operating circuit of a high pressure discharge device, particularly a high pressure mercury vapour lamp 1. The resistor may be the ballast resistor, and may be of silicon carbide. The lamp is also connected in series with an inductor 8, and as shown, is supplied with D.C. through a switch 6 ; the supply alternatively may be alternating. The lamp may be started by an interrupter 17 which supplies alternating current to the primary winding 15 of a starting transformer 14. The secondary winding 13 thereof charges a capacitor 10 across which is connected a spark gap 11 and an extension 8a of the inductor 8. The components 8a, 10, 11 form an oscillatory circuit which applies an H.F. potential, amplified by the autotrans'ormer action of the inductor 8 and its extension 8a, across the lamp. A contactor 16 whose actuating winding 24 is connected across the resistor 7, disconnects the starting circuit when the voltage across the resistor has risen to its normal operating value. Specification 612,958 is referred to.
GB26560/51A 1950-11-13 1951-11-13 Improvements in and relating to starting and operating circuits for high pressure gaseous discharge devices Expired GB707318A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US707318XA 1950-11-13 1950-11-13

Publications (1)

Publication Number Publication Date
GB707318A true GB707318A (en) 1954-04-14

Family

ID=22097044

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26560/51A Expired GB707318A (en) 1950-11-13 1951-11-13 Improvements in and relating to starting and operating circuits for high pressure gaseous discharge devices

Country Status (1)

Country Link
GB (1) GB707318A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420893A1 (en) * 1978-03-22 1979-10-19 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh HIGH PRESSURE DISCHARGE LAMP STARTING APPARATUS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420893A1 (en) * 1978-03-22 1979-10-19 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh HIGH PRESSURE DISCHARGE LAMP STARTING APPARATUS

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