GB1357746A - Operating system for a fluorescent lamp - Google Patents

Operating system for a fluorescent lamp

Info

Publication number
GB1357746A
GB1357746A GB1805971A GB1805971A GB1357746A GB 1357746 A GB1357746 A GB 1357746A GB 1805971 A GB1805971 A GB 1805971A GB 1805971 A GB1805971 A GB 1805971A GB 1357746 A GB1357746 A GB 1357746A
Authority
GB
United Kingdom
Prior art keywords
coil
coils
lamp
wound
electrodes
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
GB1805971A
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.)
Kuroi Electric Ind Co
Original Assignee
Kuroi Electric Ind Co
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 Kuroi Electric Ind Co filed Critical Kuroi Electric Ind Co
Publication of GB1357746A publication Critical patent/GB1357746A/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
    • H05B41/18—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 a starting switch
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/05—Starting and operating circuit for fluorescent lamp

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1357746 Discharge lamp circuits KUROI ELECTRIC INDUSTRIAL CO 28 May 1971 [30 Nov 1970] 18059/71 Heading H2H [Also in Division H1] A starting and operating circuit for a heated electrode discharge lamp 4 comprises a magnetic circuit upon which are wound a lamp current limiting coils N 1 , N 2 , an electrode preheating coil N 3 in parallel with the lamp electrodes 5, 6 and two electrode heating coils Nf1, Nf2, the coil N 3 being connected in series with a glow switch 7. The magnetic circuit is preferably 3-limbed and formed by confronting two E-cores, Fig. 2, the coils N 1 , N 2 being wound on opposite outside limbs, and coils Nf1, Nf2, N3 all wound on the centre leg. Flux derived in the outside limbs subtractively combines in the centre, and during a starting operation with switch 7 closed, is superimposed with the flux of coil N 3 whereby an A.C. voltage is generated across both electrodes 5, 6 of a magnitude sufficient to pre-heat them prior to lamp ignition. After ignition, coil N 3 is removed from the circuit and the small flux through Nf1, Nf2 is sufficient to cause electrodes 5, 6 to be maintained at a running temperature.
GB1805971A 1970-11-30 1971-05-28 Operating system for a fluorescent lamp Expired GB1357746A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45105644A JPS50636B1 (en) 1970-11-30 1970-11-30

Publications (1)

Publication Number Publication Date
GB1357746A true GB1357746A (en) 1974-06-26

Family

ID=14413147

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1805971A Expired GB1357746A (en) 1970-11-30 1971-05-28 Operating system for a fluorescent lamp

Country Status (7)

Country Link
US (1) US3728578A (en)
JP (1) JPS50636B1 (en)
DE (1) DE2138451C3 (en)
FR (1) FR2115780A5 (en)
GB (1) GB1357746A (en)
IT (1) IT939141B (en)
SE (1) SE7414338L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263201A (en) * 1992-01-07 1993-07-14 Neet Lighting Limited Fluorescent light power source, inverter, transformer and transformer core

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211952A (en) * 1965-10-12 Fluorescent lamp operating circuit
GB525133A (en) * 1939-02-14 1940-08-22 Gen Electric Co Ltd Improvements in circuit arrangements for operating electric discharge devices
US2802143A (en) * 1955-09-07 1957-08-06 Keiji Tanaka Starting device for a preheating type fluorescent lamp
US3047772A (en) * 1957-01-14 1962-07-31 Keiji Tanaka High output starting device for a preheating type fluorescent lamp
US3114076A (en) * 1961-08-15 1963-12-10 Kobayashi Takizo Fluorescent lamp circuit and starting means therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263201A (en) * 1992-01-07 1993-07-14 Neet Lighting Limited Fluorescent light power source, inverter, transformer and transformer core

Also Published As

Publication number Publication date
SE7414338L (en) 1974-11-14
IT939141B (en) 1973-02-10
DE2138451C3 (en) 1975-10-30
JPS50636B1 (en) 1975-01-10
FR2115780A5 (en) 1972-07-07
US3728578A (en) 1973-04-17
DE2138451B2 (en) 1975-03-13
DE2138451A1 (en) 1972-06-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee