GB937577A - Improvements relating to electric discharge lamp circuits - Google Patents

Improvements relating to electric discharge lamp circuits

Info

Publication number
GB937577A
GB937577A GB26722/61A GB2672261A GB937577A GB 937577 A GB937577 A GB 937577A GB 26722/61 A GB26722/61 A GB 26722/61A GB 2672261 A GB2672261 A GB 2672261A GB 937577 A GB937577 A GB 937577A
Authority
GB
United Kingdom
Prior art keywords
discharge
resistor
transformer
supply
lamp
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
GB26722/61A
Inventor
Walter John Renaud Farmer
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB26722/61A priority Critical patent/GB937577A/en
Publication of GB937577A publication Critical patent/GB937577A/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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

937,577. Supply systems for discharge lamps. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. July 23, 1962 [July 24, 1961], No. 26722/61. Class 38 (4). To prevent operation of a discharge lamp 1 (due to excess supply voltage) before its electrodes 2, 3 have been sufficiently heated, a resistor 15 whose resistance varies inversely with its temperature is connected in series with the secondary winding 7 of the supply transformer 4, a capacitor 14 being connected across this series combination. Upon energization of the primary winding 5 the high resistance of the resistor 15 prevents initiation of the lamp discharge which would normally occur if the supply voltage was high. However passage of current through the circuit comprising members 7, 14, 15 heats up the resistor 15 and lowers its resistance, thus allowing the discharge to commence at a predetermined time after transformer energization. The capacitor 14 may be placed by a heater wire located adjacent the resistor 15. The ballast choke 11 may be generally similar to that of Specification 927,188. Alternatively the lamp discharge may be stabilized by using a supply transformer similar to that of Specification 847,417. The transformer 4 is supplied from a conventional oscillator 6 driven from a D.C. source 10.
GB26722/61A 1961-07-24 1961-07-24 Improvements relating to electric discharge lamp circuits Expired GB937577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB26722/61A GB937577A (en) 1961-07-24 1961-07-24 Improvements relating to electric discharge lamp circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26722/61A GB937577A (en) 1961-07-24 1961-07-24 Improvements relating to electric discharge lamp circuits

Publications (1)

Publication Number Publication Date
GB937577A true GB937577A (en) 1963-09-25

Family

ID=10248211

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26722/61A Expired GB937577A (en) 1961-07-24 1961-07-24 Improvements relating to electric discharge lamp circuits

Country Status (1)

Country Link
GB (1) GB937577A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753076A (en) * 1972-04-27 1973-08-14 Lighting Systems Inc Inverter circuit and switching means
DE2748441A1 (en) * 1977-10-26 1979-05-03 Licentia Gmbh Fluorescent lamp transistor inverter - uses triac controlled by state on ignition capacitor connected to secondary winding
GB2245436A (en) * 1990-05-30 1992-01-02 Solar Wide Ind Ltd Solar-powered fluorescent lamp-drive circuit
US5642016A (en) * 1990-05-30 1997-06-24 Shalvi; Ram Drive circuit for a solar lamp with automatic electrical control of the lamp operating conditions

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753076A (en) * 1972-04-27 1973-08-14 Lighting Systems Inc Inverter circuit and switching means
DE2748441A1 (en) * 1977-10-26 1979-05-03 Licentia Gmbh Fluorescent lamp transistor inverter - uses triac controlled by state on ignition capacitor connected to secondary winding
GB2245436A (en) * 1990-05-30 1992-01-02 Solar Wide Ind Ltd Solar-powered fluorescent lamp-drive circuit
US5642016A (en) * 1990-05-30 1997-06-24 Shalvi; Ram Drive circuit for a solar lamp with automatic electrical control of the lamp operating conditions

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