EP 0143917 B1 19880518 - DOUBLE-BASED INCANDESCENT LAMP
Title (en)
DOUBLE-BASED INCANDESCENT LAMP
Publication
Application
Priority
DE 8325715 U 19830907
Abstract (en)
[origin: EP0143917A2] 1. An electric incandescent lamp (1), particularly a halogen incandescent lamp having a tubular bulb (2) made of high-melting glass quartz glass, for example, the ends of which are closed by deformations (4, 5) and having a coiled filament (3) which is retained in the axis of the bulb (2) by one or more holders (8) made of tungsten wire, where the holders (8) comprise a smaller-diameter coiled section (9) which surrounds the filament (3) and a larger-diameter coiled section (10) which contacts the bulb (2) internally, characterized in that the individual holders (8) are fixed by bosses (11) in each case between two turns of the holder section (10) in contact with the bulb, whilst the bosses consist of local deformations of the bulb wall projecting radially inwards.
IPC 1-7
IPC 8 full level
H01K 1/24 (2006.01)
CPC (source: EP)
H01K 1/24 (2013.01)
Designated contracting state (EPC)
BE DE FR GB IT
DOCDB simple family (publication)
EP 0143917 A2 19850612; EP 0143917 A3 19860108; EP 0143917 B1 19880518; DE 3471403 D1 19880623; DE 8325715 U1 19850221
DOCDB simple family (application)
EP 84110667 A 19840907; DE 3471403 T 19840907; DE 8325715 U 19830907