H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 65/00 (2006.01) H01J 7/22 (2006.01) H01J 9/00 (2006.01) H01J 9/38 (2006.01) H01J 9/395 (2006.01) H01J 61/24 (2006.01) H01J 61/28 (2006.01) H01J 61/30 (2006.01) H01J 61/42 (2006.01) H01J 65/04 (2006.01)
Patent
CA 2133510
ELECTRODELESS FLUORESCENT LAMP WITH OPTIMIZED AMALGAM POSITIONING Abstract An amalgam is accurately placed and retained in an optimal location near the cold spot of an electrodeless SEF lamp for operation at a mercury vapor pressure in the optimum range from approximately four to seven millitorr. The amalgam is positioned at the tip of an extended exhaust tube near the apex of the lamp envelope by forming an indentation in the exhaust tube and, in some embodiments, a dose locating member in combination therewith. An evacuation hole is formed below the indentation for evacuation of the lamp envelope, or bulb, during lamp fabrication. In an alternative embodiment, the extension of the exhaust tube is situated perpendicular to the main portion of the tube to allow for lateral adjustment of the position of the amalgam, thereby allowing for even further control of the amalgam operating temperature.
Borowiec Joseph Christopher
Chang Hsueh-Rong
Senecal Robert Arthur
Company General Electric
Craig Wilson And Company
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