GB1369962A - Circuits for igniting fluorescent lamps - Google Patents

Circuits for igniting fluorescent lamps

Info

Publication number
GB1369962A
GB1369962A GB614173A GB614173A GB1369962A GB 1369962 A GB1369962 A GB 1369962A GB 614173 A GB614173 A GB 614173A GB 614173 A GB614173 A GB 614173A GB 1369962 A GB1369962 A GB 1369962A
Authority
GB
United Kingdom
Prior art keywords
lamp
thyristor
circuits
smolyansky
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
GB614173A
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.)
Smolyansky R E
Original Assignee
Smolyansky R E
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 Smolyansky R E filed Critical Smolyansky R E
Priority to GB614173A priority Critical patent/GB1369962A/en
Publication of GB1369962A publication Critical patent/GB1369962A/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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices
    • H05B41/044—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes
    • H05B41/046—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes using controlled semiconductor devices

Abstract

1369962 Circuits for starting discharge lamps R E SMOLYANSKY L I FAINSHMIDT V A SMOLYANSKY E I AFANASIEVA L A PETROV J P ZAVALSKY and E A ALPEROVICH 8 Feb 1973 6141/73 Heading H2H A circuit for starting a discharge lamp 1 comprises electronic switches 5, 10 and a photosensitive device 16 positionable adjacent one of the thermionic electrodes 2 of the lamp and responsive to its light emission. When an A.C. supply is connected to terminals a, b heating current flows through the electrodes 2 via the thyristor 5 connected across a bridge rectifier 4. The lamp 1 eventually emits a flush of light which is received by the device 16 thereby lowering its resistance and triggering the thyristor 10. The thyristor 5 is therefore switched off causing resonance in the circuit formed by a ballast 3 and a capacitor 17. A high voltage pulse is therefore applied to the lamp to start the lamp. In a modification the thyristors and the rectifier bridge are replaced by a pair of triacs.
GB614173A 1973-02-08 1973-02-08 Circuits for igniting fluorescent lamps Expired GB1369962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB614173A GB1369962A (en) 1973-02-08 1973-02-08 Circuits for igniting fluorescent lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB614173A GB1369962A (en) 1973-02-08 1973-02-08 Circuits for igniting fluorescent lamps

Publications (1)

Publication Number Publication Date
GB1369962A true GB1369962A (en) 1974-10-09

Family

ID=9809175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB614173A Expired GB1369962A (en) 1973-02-08 1973-02-08 Circuits for igniting fluorescent lamps

Country Status (1)

Country Link
GB (1) GB1369962A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130079A (en) * 1973-04-18 1974-12-12
US4629944A (en) * 1983-03-03 1986-12-16 Texas Instruments Incorporated Starter circuit for a fluorescent tube lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130079A (en) * 1973-04-18 1974-12-12
US4629944A (en) * 1983-03-03 1986-12-16 Texas Instruments Incorporated Starter circuit for a fluorescent tube lamp

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee