EP 0661729 A2 19950705 - High efficiency incandescent lamp.
Title (en)
High efficiency incandescent lamp.
Title (de)
Glühlampe hohen Wirkungsgrades.
Title (fr)
Lampe à incandescence à haut rendement.
Publication
Application
Priority
GB 9326544 A 19931230
Abstract (en)
An incandescent lamp has a bidirectional switch 24 in series with a filament 17 of the lamp, the switch being operable to conduct current during a part of each of the positive and negative half cycles of the sinusoidal a.c. voltage applied to the filament. The envelope 10 of the lamp is filled with a mixture of krypton and nitrogen in order to further extend the life of the lamp without reducing its brightness.
IPC 1-7
IPC 8 full level
H01K 1/40 (2006.01); H01K 1/50 (2006.01); H01K 1/64 (2006.01)
CPC (source: EP)
H01K 1/40 (2013.01); H01K 1/50 (2013.01); H01K 1/64 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0661729 A2 19950705; EP 0661729 A3 19970129; GB 9326544 D0 19940302
DOCDB simple family (application)
EP 94309511 A 19941219; GB 9326544 A 19931230