EP 0417835 A1 19910320 - Electric incandescent lamp.
Title (en)
Electric incandescent lamp.
Title (de)
Elektrische Glühlampe.
Title (fr)
Lampe à incandescence électrique.
Publication
Application
Priority
NL 8902259 A 19890911
Abstract (en)
The electric incandescent lamp has a lamp vessel (1) with a reflective coating (3). Two similar filaments (4, 5) connected electrically in parallel together constitute a polygon and are arranged at the mirror image places one of the other in a plane (19) transverse to the axis (2) of the lamp vessel. The lamp emits a symmetrical light beam having a high intensity at the centre thereof.
IPC 1-7
IPC 8 full level
H01K 1/14 (2006.01); H01K 1/18 (2006.01); H01K 9/00 (2006.01)
CPC (source: EP)
Citation (search report)
- [Y] US 2278837 A 19420407 - DE CASTRO ADOLPHE
- [YD] FR 1258680 A 19610414 - PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0417835 A1 19910320; HU 203615 B 19910828; HU T54830 A 19910328; JP H03101050 A 19910425
DOCDB simple family (application)
EP 90202354 A 19900905; HU 582890 A 19900907; JP 23725890 A 19900910