公开(公告)号：US06838813B2

公开(公告)日：2005-01-04

申请号：US10423006

申请日：2003-04-25

申请人： Bernhard Blohm ,  Kirsten Fuchs ,  Achim Hilscher ,  Peter Husslein ,  Gerald Hämmer ,  Andreas Maciejewski ,  Thomas Noll ,  Klaus Pankratz ,  Klaus Weingärtner

发明人： Bernhard Blohm ,  Kirsten Fuchs ,  Achim Hilscher ,  Peter Husslein ,  Gerald Hämmer ,  Andreas Maciejewski ,  Thomas Noll ,  Klaus Pankratz ,  Klaus Weingärtner

IPC分类号： H01J61/067 ,  F21V23/04 ,  H01J1/62 ,  H01J17/26 ,  H01J61/00 ,  H01J61/02 ,  H01J61/28 ,  H01J61/50 ,  H01J61/56 ,  H01J61/70 ,  H05B41/00

CPC分类号： H01J61/70 ,  H01J61/28

摘要： The invention relates to a low-pressure discharge lamp, having a tubular discharge vessel made from glass, the free ends of which are closed off in a gas tight manner, two electrode systems (3) each having a filament (7), two supply conductors (5, 6) and a bead (8) of glass, the ends of the supply conductors (5, 6) being fused into the ends of the discharge vessel which have been closed off in a gas tight manner and, in order to be held in a region between the filament (7) and the discharge vessel fused seal (2), into the bead (8), and a device for switching off the lamp at the end of its service life, comprising a paste (9) which contains a metal hydride and is fitted to the bead (8). According to the invention, the bead (8) consists of a glass material which has a resistivity of greater 108 Ωcm at 350° C. Moreover, the paste (9) containing the metal hydride is applied to the bead (8) in the radiation shadow with respect to the thermal radiation which emanates from the filament (7) of the lamp in operation, and is not in electrical contact with the supply conductor wires (5, 6) on the bead (8).