Halogen incandescent lamp incorporating two filaments for...

Details Halogen incandescent lamp incorporating two filaments for... Halogen incandescent lamp incorporating two filaments for...

2007-11-08

2011-12-27

Santiago, Mariceli (Department: 2879)

Electric lamp and discharge devices

Incandescent lamps

Plural filaments or glowers

C313S579000, C313S272000, C315S082000, C315S077000, C315S291000, C315S294000

Reexamination Certificate

active

08084928

ABSTRACT:
The invention relates to a halogen bulb comprising two filaments that are located (21, 22) in a lamp body (10), a first filament (21) being designed for operation at a higher electrical output than the second filament (22). To fulfil a daylight driving function, the second filament (22) is designed to produce an electrical output that is lower by a factor of 2.5 to 4 than the electrical output of the first filament (21) when operating with a standard operating voltage and is designed in such a way that it can be operated with an operating voltage that is lower than the standard operating voltage in order to produce a dimmed position light function.

REFERENCES:
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patent: 2002/0008452 (2002-01-01), Coushaine et al.
patent: 2002/0135301 (2002-09-01), Knorr et al.
patent: 2006/0038471 (2006-02-01), Buhler et al.
patent: 2006/0091775 (2006-05-01), Auer et al.
patent: 2008/0164813 (2008-07-01), Wittmann et al.
patent: 2010/0039017 (2010-02-01), Auer et al.
patent: 10 2004 040 417 (2006-02-01), None
patent: 1 038 728 (2000-09-01), None
patent: 1 667 205 (2006-06-01), None
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patent: WO 2006/097058 (2006-09-01), None
patent: WO 2006/097058 (2006-09-01), None

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