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GB1254894A - Improvements in starters for fluorescent lamps - Google Patents

Improvements in starters for fluorescent lamps

Info

Publication number
GB1254894A
GB1254894A GB4156/69A GB415669A GB1254894A GB 1254894 A GB1254894 A GB 1254894A GB 4156/69 A GB4156/69 A GB 4156/69A GB 415669 A GB415669 A GB 415669A GB 1254894 A GB1254894 A GB 1254894A
Authority
GB
United Kingdom
Prior art keywords
thyristor
lamp
filaments
jan
series
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
GB4156/69A
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.)
Yissum Research Development Co of Hebrew University of Jerusalem
Original Assignee
Yissum Research Development Co of Hebrew University of Jerusalem
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 Yissum Research Development Co of Hebrew University of Jerusalem filed Critical Yissum Research Development Co of Hebrew University of Jerusalem
Publication of GB1254894A publication Critical patent/GB1254894A/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

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1,254,894. Control systems for gas discharge lamps. YISSUM RESEARCH DEVELOPMENT CO. 24 Jan., 1969 [29 Jan., 1968], No. 4156/69. Heading H2H. Apparatus for starting a fluorescent lamp F comprises a thyristor SCR connected in series with the filaments F1, F2 of the lamp and a ballast choke L1 across an A.C. supply, the gating potential for the thyristor being derived from a voltage divider R1, R2 connected across the anode and cathode of the thyristor. Thus current flows in the filaments F1, F2 in alternate half cycles until the filaments are heated sufficiently for the lamp to strike whereupon the voltage across the lamp drops to a value insufficient to render the thyristor conductive so terminating the flow of filament current. To improve the stability of the circuit one of the resistors R may be replaced by a thermistor or a series connected diode and Zener diode. Alternatively one or more diodes may be connected in the gate connection or the cathode lead of the thyristor.
GB4156/69A 1968-01-29 1969-01-24 Improvements in starters for fluorescent lamps Expired GB1254894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL29382A IL29382A (en) 1968-01-29 1968-01-29 Starter for fluorescent lamps

Publications (1)

Publication Number Publication Date
GB1254894A true GB1254894A (en) 1971-11-24

Family

ID=11044352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4156/69A Expired GB1254894A (en) 1968-01-29 1969-01-24 Improvements in starters for fluorescent lamps

Country Status (4)

Country Link
US (1) US3588592A (en)
DE (1) DE1904336A1 (en)
GB (1) GB1254894A (en)
IL (1) IL29382A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165475A (en) * 1977-04-18 1979-08-21 Thorn Electrical Industries Limited Discharge lamp with starter circuit
US4629944A (en) * 1983-03-03 1986-12-16 Texas Instruments Incorporated Starter circuit for a fluorescent tube lamp

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720861A (en) * 1970-12-21 1973-03-13 Teletype Corp Fluorescent lamp igniting circuit
US3942070A (en) * 1974-09-10 1976-03-02 Hitachi, Ltd. Electric discharge lamp lighting device
US4119887A (en) * 1975-06-27 1978-10-10 Hitachi, Ltd. Starter for discharge lamp
US4117373A (en) * 1977-04-28 1978-09-26 General Electric Company Emergency/normal lighting circuit for a gaseous discharge lamp
NZ188933A (en) * 1977-12-01 1982-11-23 Gen Electric Co Ltd Discharge lamp supply circuit
DE3917912C1 (en) * 1989-06-01 1990-12-06 Klaus 8901 Stadtbergen De Winkler String instrument with electroacoustic amplification - has microphone installed inside body of violin or viola by flexible suspension
US9826582B2 (en) * 2014-06-15 2017-11-21 Lunera Lighting, Inc. LED retrofit lamp with a strike barrier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165475A (en) * 1977-04-18 1979-08-21 Thorn Electrical Industries Limited Discharge lamp with starter circuit
US4629944A (en) * 1983-03-03 1986-12-16 Texas Instruments Incorporated Starter circuit for a fluorescent tube lamp

Also Published As

Publication number Publication date
IL29382A (en) 1971-06-23
DE1904336A1 (en) 1969-09-11
US3588592A (en) 1971-06-28

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