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Light bulb containing an illumination body that contains carbide

A technology of illuminants and incandescent lamps, which is applied in the field of halogen incandescent lamps, can solve problems such as inability to perform process management, and achieve the effect of improving closing stability and simple structure

Inactive Publication Date: 2007-06-27
PATENT TREUHAND GESELLSCHAFT FUR ELECTRIC GLUEHLAMPEN MBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, however, the handling of the helical filament made of TaC is critical, since the brittleness of TaC is always still extremely high, so that process management is mostly not possible

Method used

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  • Light bulb containing an illumination body that contains carbide
  • Light bulb containing an illumination body that contains carbide

Examples

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Embodiment Construction

[0034] FIG. 1 shows a one-sided extruded incandescent lamp 1 with a bulb 2 made of quartz glass, an extruded part 3 and an inner feeder 6 connecting the film 4 in the extruded part 3 with the The illuminants 7 are connected. The illuminant is a simply wound, axially arranged wire of TaC, the unwound end 14 of which extends across the lamp axis. The external leads 5 are attached externally to the foil 4 . The inner diameter of the bulb is 5mm. The helical filament end 14 is then bent parallel to the lamp axis and forms there the elongated inner power supply line 6 as a whole. The feeder 6 is provided with a coating 8 over at least a part of its entire length, which part does not exceed 2000° C. in operation. The coating is composed of the materials described below.

[0035] Example of a first implementation form:

[0036] For example, the metals rhenium (melting point: 3453k), ruthenium (melting point: 2583K), osmium (melting point: 3318k), and iridium (melting point: 2683...

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Abstract

The invention relates to a light bulb comprising an illumination body, which is inserted, together with a filler material, into a bulb in a vacuum-tight manner. The illumination body has a metal carbide, whose melting point lies above that of tungsten. The current supply is configured in two parts from a first section and a second section. The current supply is configured integrally with the illumination body from a single wire and is covered with a coating that reduces the susceptibility to breakage.

Description

technical field [0001] The invention proceeds from an incandescent lamp with a carbide-containing illuminant according to the preamble of claim 1 . In particular, this is a halogen incandescent lamp which has an illuminant made of TaC or whose illuminant contains TaC as a constituent or as a coating. Background technique [0002] Incandescent lamps with carbide-containing illuminants are known from numerous documents. So far unresolved problems are the severely limited service life and the high breakability of the illuminants. The possibility mentioned in US1854970 for solving the problem of fragility consists in producing a luminous body consisting of a metal core, for example tungsten, and a rhenium-containing layer applied to the luminous body, wherein the coating is followed by Tantalum carbide coating. [0003] Tantalum carbide has a melting point approximately 500K higher than tungsten. Accordingly, the temperature of the luminous body composed of tantalum carbide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01K1/04H01K1/40
CPCH01K1/40H01K1/04
Inventor A·布恩克G·罗森鲍尔M·达姆
Owner PATENT TREUHAND GESELLSCHAFT FUR ELECTRIC GLUEHLAMPEN MBH
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