Global Patent Index - EP 0662276 B1

EP 0662276 B1 19960327 - PROCESS AND DEVICE FOR MONITORING AN INCANDESCENT LAMP, ESPECIALLY IN DARK CONDITION

Title (en)

PROCESS AND DEVICE FOR MONITORING AN INCANDESCENT LAMP, ESPECIALLY IN DARK CONDITION

Title (de)

VERFAHREN UND VORRICHTUNG ZUR ÜBERWACHUNG EINER GLÜHLAMPE, INSBESONDERE IM DUNKLEN ZUSTAND

Title (fr)

PROCEDE ET DISPOSITIF POUR LE CONTROLE D'UNE LAMPE A INCANDESCENCE, EN PARTICULIER EN SITUATION D'OBSCURITE

Publication

EP 0662276 B1 19960327 (DE)

Application

EP 93920701 A 19930910

Priority

  • EP 93920701 A 19930910
  • EP 9302454 W 19930910
  • EP 92116464 A 19920925

Abstract (en)

[origin: WO9408438A1] At the start of the switching-on process of the incandescent lamp (5), a first actual value (ILA) of the lamp current (IL) and then, after a time lapse (T), a second actual value (ILE) are measured. The time lapse (T; T1, T2, T3) is predetermined dependently upon the first actual value (IL1A, IL2A, IL3A) at the start of a switching-on process in such a way that, when a drop (I, II, III) therein occurs, the length of the time (T1, T2, T3) is extended. The difference ((Delta) I; (Delta) IL1 (Delta) IL2, (Delta) IL3) between the measured actual values is evaluated to detect the operability of the incandescent lamp. The time is preferably predetermined in such a way that the lamp does not light up until it has elapsed and the lamp is then disconnected from the supply voltage again.

IPC 1-7

H05B 37/03

IPC 8 full level

H05B 37/03 (2006.01)

CPC (source: EP US)

H05B 47/20 (2020.01 - EP US)

Designated contracting state (EPC)

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

DOCDB simple family (publication)

WO 9408438 A1 19940414; AT E136189 T1 19960415; CZ 283430 B6 19980415; CZ 58595 A3 19950614; DE 59302071 D1 19960502; DK 0662276 T3 19960805; EP 0662276 A1 19950712; EP 0662276 B1 19960327; ES 2085171 T3 19960516; FI 951382 A0 19950323; FI 951382 A 19950323; SK 37895 A3 19950809

DOCDB simple family (application)

EP 9302454 W 19930910; AT 93920701 T 19930910; CZ 58595 A 19930910; DE 59302071 T 19930910; DK 93920701 T 19930910; EP 93920701 A 19930910; ES 93920701 T 19930910; FI 951382 A 19950323; SK 37895 A 19930910