GB433769A - Improvements in or relating to installations comprising an electric discharge tube - Google Patents

Improvements in or relating to installations comprising an electric discharge tube

Info

Publication number
GB433769A
GB433769A GB12342/35A GB1234235A GB433769A GB 433769 A GB433769 A GB 433769A GB 12342/35 A GB12342/35 A GB 12342/35A GB 1234235 A GB1234235 A GB 1234235A GB 433769 A GB433769 A GB 433769A
Authority
GB
United Kingdom
Prior art keywords
coil
cathode
current
tapping
winding
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
GB12342/35A
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.)
Koninklijke Philips NV
Original Assignee
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB433769A publication Critical patent/GB433769A/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
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

433,769. Discharge devices. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. April 24, 1935, No. 12342. Convention date, July 30, 1934. [Class 39 (i)] A gas-discharge tube, such as a lamp, is provided with an incandescent cathode and is connected in series with a choke coil, provided with tapping points, and the primary winding of the transformer, which supplies the heating current to the cathode, is connected to the choke coil in such manner that it may be connected in series with a part of the coil to the source of current for the tube. A sodium-vapour lamp 1 is provided with cathodes 2, 3 which are connected to secondary windings 4, 5 of a transformer 6, the primary winding 7 of which has its ends connected respectively to a tapping on a choke coil 10 and to the cathode 3 and terminal 8 of a current source 9. The coil 10 is connected at one end, to the cathode 2, and, at the other end, to the terminal 12 of the source 9 through a tapping. Upon a variation of the supply voltage the tappings are varied to maintain the normal voltage across the primary winding 7 and also the normal discharge current. The winding 7 may be connected permanently to the end 15 of the coil, and the arrangement may be used in cases where the frequency of the supply varies. Further, the winding 7 may be extended to form an autotransformer one end of which is connected through a resistance to a starting electrode. Numerical values are given in the Specification.
GB12342/35A 1934-07-30 1935-04-24 Improvements in or relating to installations comprising an electric discharge tube Expired GB433769A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE433769X 1934-07-30

Publications (1)

Publication Number Publication Date
GB433769A true GB433769A (en) 1935-08-20

Family

ID=6501814

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12342/35A Expired GB433769A (en) 1934-07-30 1935-04-24 Improvements in or relating to installations comprising an electric discharge tube

Country Status (1)

Country Link
GB (1) GB433769A (en)

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