EP 0239006 A2 19870930 - Incandescent lamp and method for its manufacture.
Title (en)
Incandescent lamp and method for its manufacture.
Title (de)
Halogenglühlampe und Verfahren zu ihrer Herstellung.
Title (fr)
Lampe à incandescence à halogène et son procédé de fabrication.
Publication
Application
Priority
DE 3609908 A 19860324
Abstract (en)
[origin: US4812710A] To permit easy attachment of a coiled filament, and especially a coiled-coil or double-twist filament, to the current supply leads within a lamp bulb, in which the current supply leads are made of tungsten, each current supply lead is flattened to form a plate-like flattened surface in the vicinity of the terminal end of the current supply lead. The secondary coiling of a coiled-coil filament-or the single coil of a single-coiled filament-is then slipped over the end portion of the lead-in to extend over and about the flattened portion and with a few turns adjacent the flattened portion and therebeyond on the end portion (15) of the current lead-in, thereby retaining the end portion in position due to the additional width of the flattened portion while providing a reliable electrical contact. The greatest width of the flattened portion is slightly greater than the inner diameter of the secondary coiling of the filament (13), for example about 5% to 20% wider.
Abstract (de)
Halogenglühlampe (1) mit inneren Stromzuführungen (7) aus Wolfram, bei der der doppeltgewendelte Leuchtkörper (13) auf den inneren Stromzuführungen (7) mittels Anflachungen (19) gehaltert wird. Der Durchmesser der inneren Stromzuführungen (7) ist geringfügig kleiner als der Innendurchmesser des Sekundärgewendels des Leuchtkörpers (13). Die größte Breite der Anflachung (19) ist geringfügig größer als der Innendurchmesser des Sekundärgewendels des Leuchtkörpers (13).
IPC 1-7
IPC 8 full level
H01K 1/18 (2006.01); H01K 1/16 (2006.01); H01K 1/40 (2006.01); H01K 3/06 (2006.01)
CPC (source: EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0239006 A2 19870930; EP 0239006 A3 19891025; EP 0239006 B1 19921223; DE 3609908 A1 19871001; DE 3783153 D1 19930204; JP 2536863 B2 19960925; JP S62232852 A 19871013; US 4812710 A 19890314
DOCDB simple family (application)
EP 87104032 A 19870319; DE 3609908 A 19860324; DE 3783153 T 19870319; JP 6816587 A 19870324; US 2470887 A 19870311