Global Patent Index - EP 0703600 B1

EP 0703600 B1 2000-01-26 - High pressure discharge lamp

Title (en)

High pressure discharge lamp

Title (de)

Hochdruckentladungslampe

Title (fr)

Lampe à décharge haute pression

Publication

EP 0703600 B1 (DE)

Application

EP 95112861 A

Priority

DE 9415217 U

Abstract (en)

[origin: EP0703600A2] The lamp has a discharge vessel (2) contg. an axially mounted cathode (4) and anode (3) and an ionisable filling. The cathode has a cylindrical base body (8) which narrows to a point (10) and the cathode is at least partially coated by a carbide film. The whole of the narrowing region between the tip and the base body is free of carbide, whilst the base body is at least partly coated with carbide. The lamp contains mercury in a quantity of 70 to 130 mg/cm3, the electrode separation is 0.4 to 0.8 mm. and the working voltage is about 20 to 29 volts, esp. about 23 volts.

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

H01J 61/073

IPC 8 full level (invention and additional information)

H01J 61/02 (2006.01); H01J 61/073 (2006.01); H01J 61/16 (2006.01); H01J 61/20 (2006.01); H01J 61/82 (2006.01)

CPC (invention and additional information)

H01J 61/025 (2013.01); H01J 61/073 (2013.01); H01J 61/0735 (2013.01); H01J 61/16 (2013.01); H01J 61/20 (2013.01); H01J 61/82 (2013.01)

Designated contracting state (EPC)

BE DE FR GB IT NL

DOCDB simple family

DE 9415217 U1 19960307; EP 0703600 A2 19960327; EP 0703600 A3 19980506; EP 0703600 B1 20000126; JP 3022910 U 19960402; US 5629585 A 19970513