US 2013/0169150 A1 · INCREASED WEIGHT OF EMISSION MATERIALS ON FLUORESCENT LAMP ELECTRODES

Abstract

A fluorescent lamp has increased weight of emission mix material on the metal coils forming the electrodes. The coating layer of emission mix material includes in the range of 70 weight % to 85 weight % alkaline earth carbonate content. The coating layer of emission mix material has a particle size distribution by volume with two maxima, and one of the maxima is at a particle size that is no more than half and up to one tenth smaller than of the particle size of the other maximum. The smaller of the two maxima constitutes 10 weight % to 40 weight % of the alkaline earth carbonates in the coating layer of emission mix material. A method for making fluorescent lamp includes the step of installing at least one electrode coated with an emission mix material including more than 70 weight % alkaline earth carbonate content.

Claims20

Dependent claims

A method for making a light source that includes a substantially transparent envelope having an inner surface coated with a layer including a phosphor composition, the method comprising:

installing in the envelope at least one electrode coated with an emission mix material, wherein the at least one electrode coated with an emission mix material has been prepared by coating an electrode with a suspension comprising more than about 70 weight % alkaline earth carbonate content;
evacuating the envelope;
and
adding into the evacuated envelope and confining within the envelope, a first amount of mercury and a second amount of an inert gas to produce the light source.

1 more element

Dependencies are inferred from the claim text.

Increased weight of emission materials on fluorescent lamp electrodes

Life of this patent

Increased weight of emission materials on fluorescent lamp electrodes

Life of this patent

Abstract

Claims20