GB616049A - Improvements in circuits for electric discharge apparatus - Google Patents

Improvements in circuits for electric discharge apparatus

Info

Publication number
GB616049A
GB616049A GB25103/46A GB2510346A GB616049A GB 616049 A GB616049 A GB 616049A GB 25103/46 A GB25103/46 A GB 25103/46A GB 2510346 A GB2510346 A GB 2510346A GB 616049 A GB616049 A GB 616049A
Authority
GB
United Kingdom
Prior art keywords
lamp
windings
winding
current
electrodes
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
GB25103/46A
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 GB616049A publication Critical patent/GB616049A/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

616,049. Supply systems for space discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 22, 1946, No. 25103. Convention date, Feb. 16, 1945. [Class 38 (iv)] In order that the voltage applied to a discharge lamp and the current heating the filamentary electrodes thereof may both be reduced when the lamp strikes main secondary windings 2a, 2b in series with the lamp are arranged on separated portions of an elongated transformer core A and windings 3, 4 supplying heating current to the electrodes are arranged between them; magnetic shunts may also be arranged between the windings. The main secondary winding 2a is preferably closely coupled with the primary winding 1 and these two windings may form a step-up autotransformer with a power-factor condenser connected across the full winding. When the lamp strikes the current in winding 2b produces a flux opposing that due to the primary winding causing a fall in lamp voltage and in heating current.
GB25103/46A 1945-02-16 1946-08-22 Improvements in circuits for electric discharge apparatus Expired GB616049A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR616049X 1945-02-16

Publications (1)

Publication Number Publication Date
GB616049A true GB616049A (en) 1949-01-14

Family

ID=8981334

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25103/46A Expired GB616049A (en) 1945-02-16 1946-08-22 Improvements in circuits for electric discharge apparatus

Country Status (1)

Country Link
GB (1) GB616049A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582709A (en) * 1967-09-23 1971-06-01 Shungo Furui Plural flourescent lamp starting circuit using an unignited lamp as ballast and a flux leakage transformer as to obtain suitable control voltages

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582709A (en) * 1967-09-23 1971-06-01 Shungo Furui Plural flourescent lamp starting circuit using an unignited lamp as ballast and a flux leakage transformer as to obtain suitable control voltages

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