Koninklijke Philips Corporation N.V.

U.S. Philips Corporation

Peter Jozef Vrugt

Franciscus Johannes Gerardus Hakkens

Josephus Christiaan Maria Hendricx

Durandus Kornelius Dijken

Johannes T Klomp

Cornelis Johannes Maria Denissen

Marinus Cornelis Raas

Adrianus Gerardus Maria De Nijs

Alexander Johannes Adrianus Cornelia Dorrestein

Changlong Ning

A ceramic burner, a ceramic metal halide lamp, and a method of sealing the ceramic burner is provided. The ceramic burner comprises a discharge vessel enclosing a discharge space that is provided with an ionizable filling comprising one or more halides. The discharge vessel comprises a ceramic wall arranged between a first and a second end portion. The first and the second end portion are arranged such that current supply conductors are passed through the end portions to respective electrodes arranged in the discharge space for maintaining a discharge. The ceramic wall of the discharge vessel comprises a tube for introducing the ionizable filling into the discharge vessel during manufacture of the ceramic burner. The tube projects from the ceramic wall and is provided with a gastight seal. The effect of using the tube is that it enables the gastight seal to be arranged away from the ceramic wall of the discharge vessel at a projecting end of the tube.

Ceramic burner for ceramic metal halide lamp

The invention provides a metal halide lampwherein the concentration of the filling components fulfill a condition according to claim. Such a lamp is found to be a good alternative to existing high-pressure discharge lamps (Ceramic Discharge Metal halide lamps) based on rare earth fillings or other metal halide fillings. In addition, such a lamp can be dimmed without a substantial shift of the color point. Such a lamp can also have photometric properties that are substantially independent of the arrangement of the lamp and/or the external temperature.

Metal halide lamp

A high-pressure discharge lamp and a reflector lamp including a discharge vessel enclosing a discharge space which is provided with an ionizable filling comprising one or more halides. The discharge vessel is substantially constituted by a ceramic material having first and second end portions. Current-supply conductors issue through each end portion to respective electrodes arranged in the discharge space so as to maintain a discharge. At least one of the current-supply conductors is formed as a rod including iridium. The rod is directly sealed to the ceramic material.

High-pressure discharge lamp having a ceramic discharge vessel directly sealed to a rod

Tools for the handling and shaping of glass, such as dies, moulds, shears. Sticking of the glass to the tool is prevented by the presence, at the tool surface, of a layer which has a low intrinsic strength with respect to the glass. This layer may be present as such or may be produced after oxidation. A number of possible materials are: boron carbide, Ni-Cr-B-alloys, tantalum boride.

Tools for the handling and shaping of glass

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Eindhoven, Netherlands

Peter Jozef Vrugt