H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 61/35 (2006.01) H01J 9/24 (2006.01) H01J 61/40 (2006.01)
Patent
CA 2064330
ABSTRACT OF THE DISCLOSURE. To reduce the transmissivity of glass, and particularly quartz glass, especially highly thermally loaded quartz glass of discharge lamps or halogen incandescent lamps, a coating or glaze is applied to the bulb and adjacent regions which includes, as an ultraviolet light absorption, a glaze of cerium fluoride (CeF3) and aluminum silicate (A1203.SiO2), in a relationship, by weight, of about 3 : 1, preferably about 2 : 1. The weight relationship of A1203 to SiO2 in the mixture is about 1.7 : 1. The mixture can be applied in form of an alcohol or alcohol- like suspension, after grinding to a grain size of less than 300 mesh, by spraying, dripping on, painting or the like, subsequent drying for 10 seconds, and firing in a hydrogen/oxygen flame or in an ordinary gas flame for about 2 seconds, while axially rotating the lamp bulb.
Deisenhofer Manfred
Weiss Werner
Fetherstonhaugh & Co.
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
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