GB640156A - Improvements in circuit arrangements for operating electric discharge lamps - Google Patents

Improvements in circuit arrangements for operating electric discharge lamps

Info

Publication number
GB640156A
GB640156A GB584247A GB584247A GB640156A GB 640156 A GB640156 A GB 640156A GB 584247 A GB584247 A GB 584247A GB 584247 A GB584247 A GB 584247A GB 640156 A GB640156 A GB 640156A
Authority
GB
United Kingdom
Prior art keywords
auxiliary electrode
cathode
source
gaps
anode
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
GB584247A
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.)
British Thomson Houston Co Ltd
Original Assignee
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB584247A priority Critical patent/GB640156A/en
Publication of GB640156A publication Critical patent/GB640156A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • H05B41/30Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/34Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp to provide a sequence of flashes

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

640,156. Control systems for discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., and BEESON, E. J. G. Feb. 28, 1947, No. 5842. [Class 38 (iv)] [Also in Group XL (a)] A compact-source or H.P.M.U. lamp supplied from a D.C. source is started by a high-voltage surge applied between two electrodes of the lamp of which one is the anode A and the other may be an auxiliary electrode AE near the cathode K, the surge being obtained by the discharge of a condenser C, which has been charged to a materially higher voltage than that of the source, through two spark-gaps G1, G2. As shown, the anode and auxiliary electrode are each connected to the positive pole of the source through a resistance and highfrequency choke and the condenser is charged by the transformer T when a switch S is opened, an oscillatory discharge occurring when the condenser voltage becomes sufficient to break down the gaps and the space between auxiliary electrode and cathode. In Fig. 2 (not shown) the respective spark-gaps are connected to anode and cathode and the auxiliary electrode is dispensed with. The transformer windings are centre-tapped and interconnected as shown in Fig. 1. The arrangement may be used also when a two-wattage simmering arc is maintained in the lamp; the auxiliary electrode carrying this arc is then disposed as far behind the cathode as possible to minimize the light collected therefrom by the optical system. Specification 545,388, [Group XL (a)], is referred to.
GB584247A 1947-02-28 1947-02-28 Improvements in circuit arrangements for operating electric discharge lamps Expired GB640156A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB584247A GB640156A (en) 1947-02-28 1947-02-28 Improvements in circuit arrangements for operating electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB584247A GB640156A (en) 1947-02-28 1947-02-28 Improvements in circuit arrangements for operating electric discharge lamps

Publications (1)

Publication Number Publication Date
GB640156A true GB640156A (en) 1950-07-12

Family

ID=9803646

Family Applications (1)

Application Number Title Priority Date Filing Date
GB584247A Expired GB640156A (en) 1947-02-28 1947-02-28 Improvements in circuit arrangements for operating electric discharge lamps

Country Status (1)

Country Link
GB (1) GB640156A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006108407A1 (en) * 2005-04-14 2006-10-19 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Starter auxiliary electrode starting device with an arc gap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006108407A1 (en) * 2005-04-14 2006-10-19 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Starter auxiliary electrode starting device with an arc gap

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