Global Patent Index - EP 0727921 B1

EP 0727921 B1 2001-04-25 - Method for shutting-down a Circuit for operating a discharge lamp

Title (en)

Method for shutting-down a Circuit for operating a discharge lamp

Title (de)

Verfahren zum Abschalten einer Schaltungsanordnung zum Betrieb einer Entladungslampe

Title (fr)

Procédé pour desactiver un circuit pour alimenter une lampe à décharge

Publication

EP 0727921 B1 (DE)

Application

EP 96101834 A

Priority

DE 19505460 A

Abstract (en)

[origin: EP0727921A2] The gas-discharge tube (LP) with e.g. its preheater (VH) is connected to the output of a generator (G) of AC at a predetermined high frequency from the mains supply. A control input of the generator is connected to a switch-off device (AV) producing a signal (CS1) when activated by the detector (VE) of the peak-to-peak voltage across the lamp. The output (UA) of the detector is proportional to the detected peak-to-peak voltage. When this output exceeds a threshold value the generator is switched off.

IPC 1-7 (main, further and additional classification)

H05B 41/298

IPC 8 full level (invention and additional information)

H05B 41/298 (2006.01)

CPC (invention and additional information)

H05B 41/2985 (2013.01)

Citation (examination)

EP 0696157 A1 19960207 - OSRAM SYLVANIA INC [US]

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB IT LI NL SE

EPO simple patent family

EP 0727921 A2 19960821; EP 0727921 A3 19980527; EP 0727921 B1 20010425; AT 200842 T 20010515; DE 19505460 A1 19960822; FI 113736 B 20040531; FI 960659 A0 19960214; FI 960659 A 19960818

INPADOC legal status


2016-02-08 [REG DE R071] EXPIRY OF RIGHT

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- Document: DE 59606813

- Effective date: 20130822

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2012-01-19 [REG DE R081] CHANGE OF APPLICANT/PATENTEE

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- Free text: FORMER OWNER: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG, 81543 MUENCHEN, DE

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2002-10-15 [REG CH PL] PATENT CEASED

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2001-07-17 [ITF] IT: TRANSLATION FOR A EP PATENT FILED

- Owner name: STUDIO JAUMANN P. & C. S.N.C.

2001-05-31 [REF] CORRESPONDS TO:

- Document: DE 59606813 20010531

2001-04-30 [REG CH EP] ENTRY IN THE NATIONAL PHASE

2001-04-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

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2001-04-25 [REF] CORRESPONDS TO:

- Document: AT 200842 T 20010515

2000-09-13 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7H 05B 41/298 A

1999-12-01 [RTI1] TITLE (CORRECTION)

- Free text: METHOD FOR SHUTTING-DOWN A CIRCUIT FOR OPERATING A DISCHARGE LAMP

1999-11-10 [RTI1] TITLE (CORRECTION)

- Free text: METHOD FOR SHUTTING-DOWN A CIRCUIT FOR OPERATING A DISCHARGE LAMP

1998-10-28 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19980914

1998-09-16 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980720

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