EP 0251372 B1 19930428 - ELECTRIC INCANDESCENT LAMP FOR SERIES CONNECTION
Title (en)
ELECTRIC INCANDESCENT LAMP FOR SERIES CONNECTION
Publication
Application
Priority
DE 3620373 A 19860618
Abstract (en)
[origin: US4808885A] The electric lamp for series arrangement comprises at least one current-supply wire of nickel wire, copper wire or copper cladded wire. A shortcircuit switch is provided, which consists of a vitreous mass, in which copper powder is dispersed and which is fused with the current-supply wires, and of an oxide skin, which is present on the said current-supply wire at the sealing-in area in the mass. The vitreous mass is electrically conducting. An electrical connection between the current-supply wires is not obtained, however, until the filament burns through and the oxide skin breaks down due to the overvoltage then occurring.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
H01K 1/70 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0251372 A2 19880107; EP 0251372 A3 19891123; EP 0251372 B1 19930428; CA 1291204 C 19911022; DE 3620373 A1 19871223; DE 3785607 D1 19930603; JP H0719586 B2 19950306; JP S632245 A 19880107; US 4808885 A 19890228
DOCDB simple family (application)
EP 87201097 A 19870611; CA 540072 A 19870618; DE 3620373 A 19860618; DE 3785607 T 19870611; JP 14716887 A 19870615; US 6361687 A 19870618