EP 0523782 A2 19930120 - High-pressure sodium lamp.
Title (en)
High-pressure sodium lamp.
Title (de)
Hochdrucknatriumlampe.
Title (fr)
Lampe à décharge dans la vapeur de sodium à haute pression.
Publication
Application
Priority
EP 91201820 A 19910712
Abstract (en)
A high-pressure sodium lamp of the invention radiates white light with a colour temperature higher than 2250 K. The lamp is provided with a discharge vessel (1) with a ceramic wall (2). In the discharge vessel (1), electrodes (10a, 10b) are arranged which are connected to current supply conductors (20a, 20b) which are passed through the wall (2) in a gastight manner. The electrodes (10a, 10b) each have a rod (11a) ending in a tip (12a) and with a length l and diameter d. The rod (11a) of the electrodes (10a, 10b) is provided with a single winding (13a) of a wire with a diameter of at most d/3, which winding (13a) is remote from the tip (12a) of the rod (11a) over a distance of at most 2d. This construction enables a quick ignition of the lamp. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 61/073 (2006.01); H01J 61/54 (2006.01); H01J 61/82 (2006.01)
CPC (source: EP)
H01J 61/0732 (2013.01); H01J 61/825 (2013.01)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0523782 A2 19930120; EP 0523782 A3 19930210; EP 0523782 B1 19951004; DE 69205228 D1 19951109; DE 69205228 T2 19960502; JP H05190146 A 19930730
DOCDB simple family (application)
EP 92202047 A 19920707; DE 69205228 T 19920707; JP 18528392 A 19920713