GB612787A - Improvements in or relating to devices comprising an electric gas discharge tube - Google Patents

Improvements in or relating to devices comprising an electric gas discharge tube

Info

Publication number
GB612787A
GB612787A GB16939/46A GB1693946A GB612787A GB 612787 A GB612787 A GB 612787A GB 16939/46 A GB16939/46 A GB 16939/46A GB 1693946 A GB1693946 A GB 1693946A GB 612787 A GB612787 A GB 612787A
Authority
GB
United Kingdom
Prior art keywords
winding
tube
impedance
choke
wound
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
GB16939/46A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB612787A publication Critical patent/GB612787A/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

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

612,787. Supply systems for space discharge apparatus. PHILIPS LAMPS, Ltd. June 4, 1946, No. 16939. Convention date, April 6, 1940. [Class 38 (iv)] The heating circuit of a discharge tube 1 includes, besides the normal ballast impedance 9 a double-wound choke 8, 13 with one winding on each side of a filament 2 and wound so that as far as the electrode heating circuit through the condenser 14 is concerned its impedance is a minimum. When, however, the electrodes are sufficiently heated and the tube starts, the winding 13 being shunted by the discharge carries less current than winding 8 and the choke has an effective impedance. A thinner gauge wire may be used for winding 8 than for winding 13 and the winding 8 may consist of a few strands of a stranded conductor, the major number of which serve for the winding 13. The condenser 14 and ballast 9 may be interchanged. A second double-wound choke may be associated with the other terminals of the tube. The invention is applicable to any tube comprising conducting bridges between terminals 4, 5 and 6, 7, whereby the circuit becomes interrupted when the tube is not in its holder; these bridges may be auxiliary discharge paths.
GB16939/46A 1940-04-06 1946-06-04 Improvements in or relating to devices comprising an electric gas discharge tube Expired GB612787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL612787X 1940-04-06

Publications (1)

Publication Number Publication Date
GB612787A true GB612787A (en) 1948-11-17

Family

ID=19788160

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16939/46A Expired GB612787A (en) 1940-04-06 1946-06-04 Improvements in or relating to devices comprising an electric gas discharge tube

Country Status (1)

Country Link
GB (1) GB612787A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200290A (en) * 1960-05-25 1965-08-10 Philips Corp Ballast device and circuit for gas discharge lamps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200290A (en) * 1960-05-25 1965-08-10 Philips Corp Ballast device and circuit for gas discharge lamps

Similar Documents

Publication Publication Date Title
US2097261A (en) Lighting device
GB777103A (en) Improvements in electric discharge lamps
GB612787A (en) Improvements in or relating to devices comprising an electric gas discharge tube
GB370338A (en) Improvements in luminous electric discharge tubes
US2307971A (en) Light source
GB553301A (en) Improvements in or relating to circuit arrangements for electric gas discharge tubes
US2581546A (en) Tubular electric discharge lamp unit
US3176187A (en) Safety system for fluorescent lamp ballasts
GB1026069A (en) Arc discharge lamp
US2217794A (en) Multiple filament incandescent electric lamp
US2795692A (en) Fluorescent lamp fixture and circuit
US2018856A (en) Gas arc lamp
US2284775A (en) Ultra violet light source
US2368410A (en) Current-limiting control for electric discharge devices
US2680211A (en) Sequence pulse starting circuit for fluorescent lamps
GB533451A (en) Improvements in and relating to electric discharge devices
GB338494A (en) Improvements in or relating to vacuum tube lights and methods of operating the same
GB619066A (en) Improvements in or relating to devices comprising electric discharge tubes
GB529123A (en) Improvements relating to metal vapour electric discharge lamps
US1873711A (en) Method and means for utilizing thermionic tubes having open filaments
GB771591A (en) Improvements in or relating to electric lighting fittings for the operation of electric discharge lamps
GB388665A (en) Improvements in or relating to devices comprising an electric luminous discharge tube
GB533843A (en) Improvements in and relating to circuits including electric discharge devices
GB734001A (en) Improvements in or relating to electric discharge lamps and operating circuits therefor
GB472194A (en) Improvements in or relating to electric discharge devices having auxiliary electrodes