(19)
(11) EP 0 878 829 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.03.1999 Bulletin 1999/11

(43) Date of publication A2:
18.11.1998 Bulletin 1998/47

(21) Application number: 98108867.7

(22) Date of filing: 15.05.1998
(51) International Patent Classification (IPC)6: H01J 61/067
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 16.05.1997 US 857257

(71) Applicant: OSRAM SYLVANIA INC.
Danvers, MA 01923 (US)

(72) Inventors:
  • Jankowski, John T.
    Contoocook, New Hampshire 03229 (US)
  • Ernest, Brad
    Concord, New Hampshire 03301 (US)
  • Flanagan, Robert W.
    Weare, New Hampshire 03281 (US)

(74) Representative: Lemke, Jörg-Michael, Dipl.-Ing. 
Schmiedstrasse 1, Hausen
86447 Aindling
86447 Aindling (DE)

   


(54) Discharge lamp electrode


(57) A discharge lamp electrode with a conductive coating having a substantial portion of graphite particles is disclosed. The coating has been found to substantially increase starting reliability, to reduce starting voltage and to generally reduce starting time. The coating is formed as mixture of a bonding matrix and graphite particles that is baked to bond it to the electrode.






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