GB681637A - Improvements relating to circuit arrangements for operating electric discharge lamps of the low pressure type - Google Patents

Improvements relating to circuit arrangements for operating electric discharge lamps of the low pressure type

Info

Publication number
GB681637A
GB681637A GB2167950A GB2167950A GB681637A GB 681637 A GB681637 A GB 681637A GB 2167950 A GB2167950 A GB 2167950A GB 2167950 A GB2167950 A GB 2167950A GB 681637 A GB681637 A GB 681637A
Authority
GB
United Kingdom
Prior art keywords
lamp
low pressure
discharge lamps
electric discharge
pressure type
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
GB2167950A
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.)
HERBERT LAWRENCE PRIVETT
British Thomson Houston Co Ltd
Original Assignee
HERBERT LAWRENCE PRIVETT
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 HERBERT LAWRENCE PRIVETT, British Thomson Houston Co Ltd filed Critical HERBERT LAWRENCE PRIVETT
Priority to GB2167950A priority Critical patent/GB681637A/en
Publication of GB681637A publication Critical patent/GB681637A/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

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

681,637. Supply systems for series-connected space discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., CLARKE, M. G., and PRIVETT, H. L. Aug. 1, 1951 [Sept. 1, 1950], No. 21679/50. Class 38 (iv). Two or more low pressure discharge lamps L<SP>1</SP>, L<SP>2</SP> are started by shunting all except one by a condenser C of such capacitance that on closing a supply switch S substantially the whole of the high no-load voltage of the secondary winding TS of a high reactance ballast transformer T is applied to the unshunted lamp L<SP>2</SP> which thereupon strikes, and due to the ensuing fall in volt drop across this lamp the high secondary voltage is applied across the condenser(s) C to strike the other lamp(s), whereupon the secondary voltage drops to a sufficiently low running value. Each lamp may have a conducting starting strip (not shown) and each thermionic electrode E is shortcircuited.
GB2167950A 1950-09-01 1950-09-01 Improvements relating to circuit arrangements for operating electric discharge lamps of the low pressure type Expired GB681637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2167950A GB681637A (en) 1950-09-01 1950-09-01 Improvements relating to circuit arrangements for operating electric discharge lamps of the low pressure type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2167950A GB681637A (en) 1950-09-01 1950-09-01 Improvements relating to circuit arrangements for operating electric discharge lamps of the low pressure type

Publications (1)

Publication Number Publication Date
GB681637A true GB681637A (en) 1952-10-29

Family

ID=10167005

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2167950A Expired GB681637A (en) 1950-09-01 1950-09-01 Improvements relating to circuit arrangements for operating electric discharge lamps of the low pressure type

Country Status (1)

Country Link
GB (1) GB681637A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054930A (en) * 1960-05-18 1962-09-18 Jefferson Electric Co Plural lamp ballast
GB2337880A (en) * 1998-05-26 1999-12-01 Oa Micro International Ltd Circuit for energising cold cathode fluorescent lamps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054930A (en) * 1960-05-18 1962-09-18 Jefferson Electric Co Plural lamp ballast
GB2337880A (en) * 1998-05-26 1999-12-01 Oa Micro International Ltd Circuit for energising cold cathode fluorescent lamps

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