GB623352A - Improvements in and relating to circuits for starting and operating electric discharge lamps - Google Patents

Improvements in and relating to circuits for starting and operating electric discharge lamps

Info

Publication number
GB623352A
GB623352A GB1197347A GB1197347A GB623352A GB 623352 A GB623352 A GB 623352A GB 1197347 A GB1197347 A GB 1197347A GB 1197347 A GB1197347 A GB 1197347A GB 623352 A GB623352 A GB 623352A
Authority
GB
United Kingdom
Prior art keywords
discharge lamps
choke coil
relating
circuits
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
GB1197347A
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.)
EK Cole Ltd
Original Assignee
EK Cole 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 EK Cole Ltd filed Critical EK Cole Ltd
Priority to GB1197347A priority Critical patent/GB623352A/en
Publication of GB623352A publication Critical patent/GB623352A/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

623,352. Control systems for space discharge lamps. COLE, Ltd., E. K., and STICKLEY, W. A. May 3, 1947, No. 11973. [Class 38 (iv)] Hot cathode lamps have a choke coil c in series, and serving as a normal ballast reactor, and a choke coil and condenser d between the cathode heaters so that all are in series between the supply terminals. The second choke coil is preferably in two parts, a, b, one of which is smaller than the other and has an adjustable core by means of which the circuit may be caused to resonate at the frequency of the supply. After striking of the lamp the heater current falls substantially to zero. Specification 577,459 is referred to.
GB1197347A 1947-05-03 1947-05-03 Improvements in and relating to circuits for starting and operating electric discharge lamps Expired GB623352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1197347A GB623352A (en) 1947-05-03 1947-05-03 Improvements in and relating to circuits for starting and operating electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1197347A GB623352A (en) 1947-05-03 1947-05-03 Improvements in and relating to circuits for starting and operating electric discharge lamps

Publications (1)

Publication Number Publication Date
GB623352A true GB623352A (en) 1949-05-16

Family

ID=9996063

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1197347A Expired GB623352A (en) 1947-05-03 1947-05-03 Improvements in and relating to circuits for starting and operating electric discharge lamps

Country Status (1)

Country Link
GB (1) GB623352A (en)

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