GB643781A - Fluorescent tube lighting systems - Google Patents

Fluorescent tube lighting systems

Info

Publication number
GB643781A
GB643781A GB251947A GB251947A GB643781A GB 643781 A GB643781 A GB 643781A GB 251947 A GB251947 A GB 251947A GB 251947 A GB251947 A GB 251947A GB 643781 A GB643781 A GB 643781A
Authority
GB
United Kingdom
Prior art keywords
lamp
lamps
series
byepass
ballast
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
GB251947A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB251947A priority Critical patent/GB643781A/en
Publication of GB643781A publication Critical patent/GB643781A/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

Abstract

643,781. Supply systems for space discharge lamps. NATHANSON, M. Jan. 27, 1947, No. 2519. [Class 38 (iv)] Series systems.-To start a plurality of series connected discharge lamps 36-38 from an A.C. source. 20 of voltage substantially lower than the sum of the lamp striking voltages, a byepass impedance, such as condensers 46, 51, are connected between the series functions of the lamps and that terminal of the supply to which is connected the usual series ballast, e.g. condenser 40, so that adequate starting voltage is applied to each lamp in turn as the preceding lamp strikes. The byepass and. ballast impedances may alternatively constitute inductances. Power factor improvement may be effected by parallel connecting two groups of lamps, or one group and a single lamp 39, provided respectively with capacitive and inductive ballasts and byepass impedances. The lamps may be supplied through an auto transformer in which case the inductive ballast may be dispensed with by supplying the inductive lamp group through a separate secondary winding 11 spaced from the primary winding 9 by a magnetic shunt 17.
GB251947A 1947-01-27 1947-01-27 Fluorescent tube lighting systems Expired GB643781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB251947A GB643781A (en) 1947-01-27 1947-01-27 Fluorescent tube lighting systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB251947A GB643781A (en) 1947-01-27 1947-01-27 Fluorescent tube lighting systems

Publications (1)

Publication Number Publication Date
GB643781A true GB643781A (en) 1950-09-27

Family

ID=9740987

Family Applications (1)

Application Number Title Priority Date Filing Date
GB251947A Expired GB643781A (en) 1947-01-27 1947-01-27 Fluorescent tube lighting systems

Country Status (1)

Country Link
GB (1) GB643781A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113253005A (en) * 2020-02-07 2021-08-13 群光电能科技股份有限公司 Load recognition system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113253005A (en) * 2020-02-07 2021-08-13 群光电能科技股份有限公司 Load recognition system
CN113253005B (en) * 2020-02-07 2024-01-12 群光电能科技股份有限公司 Load identification system

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