GB650992A - Improvements in or relating to circuit arrangements for electric discharge lamps - Google Patents

Improvements in or relating to circuit arrangements for electric discharge lamps

Info

Publication number
GB650992A
GB650992A GB1322948A GB1322948A GB650992A GB 650992 A GB650992 A GB 650992A GB 1322948 A GB1322948 A GB 1322948A GB 1322948 A GB1322948 A GB 1322948A GB 650992 A GB650992 A GB 650992A
Authority
GB
United Kingdom
Prior art keywords
discharge lamps
lamp
relating
electric discharge
voltage
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
GB1322948A
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.)
EKCO ENSIGN ELECTRIC Ltd
Original Assignee
EKCO ENSIGN ELECTRIC 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 EKCO ENSIGN ELECTRIC Ltd filed Critical EKCO ENSIGN ELECTRIC Ltd
Priority to GB1322948A priority Critical patent/GB650992A/en
Publication of GB650992A publication Critical patent/GB650992A/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

650,992. Supply systems for space discharge lamps. EKCO-ENSIGN ELECTRIC, Ltd., and STICKLEY, W. A. May 14, 1948, No. 13229. [Class 38 (iv)] Automatic reduction of the heating current supplied from a transformer L2 to the filamentary electrodes H<SP>1</SP>, H<SP>2</SP> of a discharge lamp F when the lamp starts is effected by including in each circuit between the electrodes and associated secondary windings L5, L6, a choke L3, L4 respectively of inductance less than that of the associated secondary winding and arranged such that the voltage across the secondary winding is opposed by the voltage across the respective choke due to the lamp current, and hence effect reduction or cancellation of the heating current. A condenser C may be included in the discharge circuit to improve starting. Specification 31284/46 (as open to inspection under Sect. 91), is referred to.
GB1322948A 1948-05-14 1948-05-14 Improvements in or relating to circuit arrangements for electric discharge lamps Expired GB650992A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1322948A GB650992A (en) 1948-05-14 1948-05-14 Improvements in or relating to circuit arrangements for electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1322948A GB650992A (en) 1948-05-14 1948-05-14 Improvements in or relating to circuit arrangements for electric discharge lamps

Publications (1)

Publication Number Publication Date
GB650992A true GB650992A (en) 1951-03-07

Family

ID=10019188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1322948A Expired GB650992A (en) 1948-05-14 1948-05-14 Improvements in or relating to circuit arrangements for electric discharge lamps

Country Status (1)

Country Link
GB (1) GB650992A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047772A (en) * 1957-01-14 1962-07-31 Keiji Tanaka High output starting device for a preheating type fluorescent lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047772A (en) * 1957-01-14 1962-07-31 Keiji Tanaka High output starting device for a preheating type fluorescent lamp

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