Halogen incandescent lamp

Details Halogen incandescent lamp Halogen incandescent lamp

2002-04-19

2003-12-23

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

C313S578000, C313S493000, C313S634000

Reexamination Certificate

active

06667573

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to a halogen incandescent lamp having a lamp bulb that has a transparent, cylindrical lamp bulb region, having a fill gas that is enclosed in the interior of the lamp bulb and contains an inert gas or an inert gas mixture and a halogen additive, having an incandescent filament arranged in the interior of the lamp bulb and having two supply leads for the incandescent filament. What is concerned, in particular, is a miniature halogen incandescent lamp with an electric power consumption of at most 10 W that is provided for use in the reflector of a battery-powered pocket lamp.
BACKGROUND OF THE INVENTION
Such a halogen incandescent lamp is disclosed in Patent Specification U.S. 5,886,466. The halogen incandescent lamp described in this document has a transparent, essentially cylindrical lamp bulb with a diameter of 6.3 mm to 8.0 mm. The lamp bulb is filled with an inert gas, in particular xenon, that is provided with a halogen additive, and encloses an incandescent filament that is connected in an electrically conducting fashion to two supply leads projecting from the lamp bulb.
SUMMARY OF THE INVENTION
It is an object of the invention to increase the useful fraction of the light produced by the incandescent filament in the case of a halogen incandescent lamp of the generic type, and to improve the imaging properties of the system in the event of use of this lamp in a reflector.
This and other objects of the invention are achieved in accordance with one aspect of the present invention directed to a halogen incandescent lamp having a lamp bulb that has a transparent, cylindrical lamp bulb region, a fill gas that is enclosed in the interior of the lamp bulb and contains an inert gas or an inert gas mixture and a halogen additive, and an incandescent filament arranged in the interior of the lamp bulb and having two supply leads for the incandescent filament. The sections, running in the interior of the lamp bulb of the lamp bulb of the supply leads are constructed as flattened wires, and the outside diameter of the cylindrical lamp bulb region has a value of 3.0 to 6.2 mm.


REFERENCES:
patent: 4005324 (1977-01-01), Dolenga et al.
patent: 4208609 (1980-06-01), Berlec
patent: 5886466 (1999-03-01), Bell et al.

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