EP 0226978 A2 19870701 - Lamp having a glass bulb with a high silicic-acid content.
Title (en)
Lamp having a glass bulb with a high silicic-acid content.
Title (de)
Lampe mit einem Kolben aus hochkieselsäurehaltigem Glas.
Title (fr)
Lampe à ampoule de verre en haute teneur d'acide silicique.
Publication
Application
Priority
DE 3544825 A 19851218
Abstract (en)
[origin: US4749902A] To improve tightness of a pinch or press seal (2a; 13a, 13b) between a molybdenum foil and quartz or similar hard glass of an electric lamp, typically a halogen incandescent lamp or metal halide discharge lamp, an intermediate melt glass layer in form of a strip is applied to the sealing foil, which has the following main components: SiO2: 60-70% Al2O3: 3-20% K2O: 12-18, all percentages by weight, the glass being, except for trace contaminants, free from Na2O. In a preferred form, the main components are: SiO2: 66% Al2O3: 18% K2O: 15%, all percentages by weight.
Abstract (de)
Lampe (1) mit Kolben (2) aus hochkieselsäurehaltigem Glas und Folieneinschmelzung, wobei zwischen Folie (6; 7) und Kolbenglas eine Zwischenschicht (10; 11) aus Lotglas vorhanden ist. Das Lotglas weist folgende Hauptbestandteile auf: SiO2 60 - 70 Gew.-% Al2O3 3 - 20 Gew.-% K2O 12 - 18 Gew.-%
IPC 1-7
IPC 8 full level
C03C 3/083 (2006.01); H01J 5/38 (2006.01); H01J 61/30 (2006.01); H01J 61/36 (2006.01); H01K 1/32 (2006.01); H01K 1/38 (2006.01)
CPC (source: EP US)
H01J 5/38 (2013.01 - EP US); H01J 61/368 (2013.01 - EP US); H01K 1/38 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0226978 A2 19870701; EP 0226978 A3 19890614; EP 0226978 B1 19911227; DE 3544825 A1 19870619; DE 3683141 D1 19920206; JP S62147650 A 19870701; US 4749902 A 19880607
DOCDB simple family (application)
EP 86117330 A 19861212; DE 3544825 A 19851218; DE 3683141 T 19861212; JP 26207886 A 19861105; US 93755286 A 19861203