Patent · US Active

Two-filament lamp

US8188658B2 · kind B2 · utility

0Cited by

2References

8Claims

0Family size

Assignee

OSRAM GmbH · DE

Inventors

Frank Auer · Herbrechtingen, DE
Gerhard Behr · Riedlingen, DE
Peter Helbig · Sontheim, DE
Christian Seichter · Herbrechtingen, DE
Klaus Wittmann · Maurepas, FR
Sascha Zelt · Beimerstetten, DE

Key dates

Filing date	Dec 10, 2007
Grant date	May 29, 2012
Priority date	—
Expiry date	Oct 13, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH01K1/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Disclosed is a lamp, particularly for a vehicle headlight, comprising two spiral-wound filaments which are retained by three feeders within a bulb that is inserted into a base. The feeders are arranged on top of one another when the lamp is adequately oriented. A tail of the first spiral-wound filament is connected to a dimming cap, said tail being located at a distance from the base, while a tail of the second spiral-wound filament is connected to the central feeder, said tail being close to the base. The second filament tail that faces away and is located at a distance from the base is connected to the upper feeder. According to the invention, the lower feeder is connected to the dimming cap by means of an end, some sections of which are angled away from a longitudinal axis of the lamp.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.