Fluorescent lamps

Details Fluorescent lamps Fluorescent lamps

H - Electricity

01

J

313/80

H01J 61/36 (2006.01) H01J 61/04 (2006.01) H01J 61/067 (2006.01)

Patent

CA 1092636

TITLE: IMPROVEMENTS IN FLUORESCENT LAMPS ABSTRACT OF THE DISCLOSURE: The invention relates to electrode mount assemblies for electric discharge and fluorescent lamps. In accordance with the first aspect of the invention the portions of the electrode support wires which are exposed to electron bombardment within the body of the lamp have at least their surface formed of refractory material. The exposed portions may be coated with a refractory material such as boron nitride or made wholly of a refractory metal such as molybdenum. According to a second aspect of the invention relatively cheap soda-lime silicate glass can be used for the end flares of the lamp tubes, because the provision of refractory surfaces on the vulnerable portions of the support wires enables a metal to be chosen for the portions of the wires passing through the glass seal which closely matches the glass in thermal expansion coefficient. The invention improves the life of lamps by reducing end blackening, reduces the incidence of cracks in the punch seal or neck regions of the lamp and may enable cheaper materials to be used for various structural items. - 1 -

282964

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