GB650108A - Improvements in and relating to starting circuits for electric discharge lamps - Google Patents

Improvements in and relating to starting circuits for electric discharge lamps

Info

Publication number
GB650108A
GB650108A GB30945/47A GB3094547A GB650108A GB 650108 A GB650108 A GB 650108A GB 30945/47 A GB30945/47 A GB 30945/47A GB 3094547 A GB3094547 A GB 3094547A GB 650108 A GB650108 A GB 650108A
Authority
GB
United Kingdom
Prior art keywords
transformer
earthed
lamp
winding
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
GB30945/47A
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
Publication of GB650108A publication Critical patent/GB650108A/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
    • H05B41/22—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 having an auxiliary starting electrode

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

650,108. Supply systems for space discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 21, 1947, No. 30945. Convention date, Nov. 22, 1946. Drawings to Specification. [Class 38 (iv)] A starting arrangement for a discharge lamp having thermionic electrodes includes an electrode arranged external to and on or near the surface of the lamp envelope and supplied from an auxiliary winding on the transformer pruviding the lamp discharge current. The transformer is provided with high leakage reactance and the auxiliary winding is so disposed on the transformer core that the voltage of the auxiliary winding is automatically reduced when the main lamp discharge occurs. The electrode' may comprise the support or the reflector for the lamp and connected to the winding through a capacitive coupling and earthed. The transformer may be of the auto type with one point of its winding earthed and with the winding portions supplying respectively the discharge current and starting electrode either side of the earthed point. In a 3-phase system the lamps are connected across the outer portion of the phase windings of a star connected transformer and the starting electrodes are connected to the neutral point, if necessary through a capacitive coupling, and " earthed." The Specification as open to inspection under Sect. 91 comprises also an arrangement whereby a number of lamps may be supplied in parallel through their respective transformers with the starting electrodes connected to a common auto-transformer through a capacitive coupling and " earthed." This subject-matter does not appear in the Specification as accepted.
GB30945/47A 1946-11-22 1947-11-21 Improvements in and relating to starting circuits for electric discharge lamps Expired GB650108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR650108X 1946-11-22

Publications (1)

Publication Number Publication Date
GB650108A true GB650108A (en) 1951-02-14

Family

ID=9003766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30945/47A Expired GB650108A (en) 1946-11-22 1947-11-21 Improvements in and relating to starting circuits for electric discharge lamps

Country Status (1)

Country Link
GB (1) GB650108A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1081143B (en) * 1957-08-21 1960-05-05 Otto Kreutzer Switching arrangement for operating fluorescent lamps with alternating current from a direct current source
US4153861A (en) * 1977-10-17 1979-05-08 Warner Arthur R Electric discharge tube apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1081143B (en) * 1957-08-21 1960-05-05 Otto Kreutzer Switching arrangement for operating fluorescent lamps with alternating current from a direct current source
US4153861A (en) * 1977-10-17 1979-05-08 Warner Arthur R Electric discharge tube apparatus

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