FR2193298B3 - - Google Patents

Info

Publication number
FR2193298B3
FR2193298B3 FR7325863A FR7325863A FR2193298B3 FR 2193298 B3 FR2193298 B3 FR 2193298B3 FR 7325863 A FR7325863 A FR 7325863A FR 7325863 A FR7325863 A FR 7325863A FR 2193298 B3 FR2193298 B3 FR 2193298B3
Authority
FR
France
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
FR7325863A
Other languages
French (fr)
Other versions
FR2193298A1 (pt
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.)
EMI Group Ltd
Original Assignee
Thorn 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 Thorn Electrical Industries Ltd filed Critical Thorn Electrical Industries Ltd
Publication of FR2193298A1 publication Critical patent/FR2193298A1/fr
Application granted granted Critical
Publication of FR2193298B3 publication Critical patent/FR2193298B3/fr
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
    • H05B41/288—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 and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2928—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
FR7325863A 1972-07-14 1973-07-13 Expired FR2193298B3 (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3316672 1972-07-14

Publications (2)

Publication Number Publication Date
FR2193298A1 FR2193298A1 (pt) 1974-02-15
FR2193298B3 true FR2193298B3 (pt) 1976-07-02

Family

ID=10349413

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7325863A Expired FR2193298B3 (pt) 1972-07-14 1973-07-13

Country Status (6)

Country Link
BE (1) BE802318A (pt)
DE (1) DE2335589A1 (pt)
FR (1) FR2193298B3 (pt)
IT (1) IT991188B (pt)
LU (1) LU68014A1 (pt)
NL (1) NL7309901A (pt)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE418775B (sv) * 1980-07-18 1981-06-22 Aos Metall Mek Verk Sett och anordning for att eliminera obehag fororsakande flimmer vid betraktande av rontgenfilm i ljusskap
DE3122183C2 (de) * 1981-06-04 1983-09-22 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zum Betrieb einer Hochdruck-Metalldampfentladungslampe und Schaltungsanordnung zur Ausübung dieses Verfahrens
US4705991A (en) * 1981-06-04 1987-11-10 U.S. Philips Corporation Method of operating a high-pressure metal vapor discharge lamp and circuit arrangement for carrying out this method
GB8711131D0 (en) * 1987-05-12 1987-06-17 Emi Plc Thorn Power supply
US4980611A (en) * 1988-04-05 1990-12-25 Neon Dynamics Corporation Overvoltage shutdown circuit for excitation supply for gas discharge tubes
US4916362A (en) * 1988-04-05 1990-04-10 Neon Dynamics Corporation Excitation supply for gas discharge tubes
EP0439861A1 (en) * 1990-01-29 1991-08-07 Koninklijke Philips Electronics N.V. Circuit arrangement
US5386181A (en) * 1992-01-24 1995-01-31 Neon Dynamics Corporation Swept frequency switching excitation supply for gas discharge tubes

Also Published As

Publication number Publication date
BE802318A (fr) 1973-11-05
FR2193298A1 (pt) 1974-02-15
DE2335589A1 (de) 1974-01-31
NL7309901A (pt) 1974-01-16
IT991188B (it) 1975-07-30
LU68014A1 (pt) 1973-10-03

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Legal Events

Date Code Title Description
ST Notification of lapse