Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Ngk Insulators, Inc.

Joachim Werner

Axel Bunk

Georg Rosenbauer

Matthias Damm

Kouichiro Maekawa

The incandescent lamp, which uses a carbon cycle process, is equipped with a luminous body which, together with a fill, is introduced in a vacuum-tight manner into a bulb, the luminous body including a metal carbide, the melting point of which is above that of tungsten. The distance between the luminous body and the wall of the bulb is less than 18 mm, with a first cycle process, which is attributed to the carbon, being effected by the use of carbon and hydrogen as fill additive, and a second cycle process, which is attributed to the metal, being effected by the use of halogen.

Incandescent lamp with a carbon cycle and a halogen cycle

A high pressure discharge lamp has a ceramic discharge vessel (8), whose s are closed with plugs (11). The metallic feedthrough, or a main part of it, has a thermal coefficient of expansion which is smaller than the coefficient of the ceramic. The current feedthrough is gas-tightly sintered directly into the plug.

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Petershausen, Germany

Joachim Werner