High-pressure sodium vapor lamp and ternary amalgam therefor

Details High-pressure sodium vapor lamp and ternary amalgam therefor High-pressure sodium vapor lamp and ternary amalgam therefor

H - Electricity

01

J

313/10, 313/137

H01J 61/18 (2006.01) H01J 61/22 (2006.01) H01J 61/82 (2006.01)

Patent

CA 1253564

-11- ABSTRACT OF THE DISCLOSURE A high pressure sodium vapor lamp for operation at a sodium vapor pressure of at least 60 Torr and which the start-up interval of variation of lamp operating volt- age is reduced by charging the lamp with a ternary amalgam of mercury, sodium and a metal selected from the group consisting of indium, gallium and tin. The atomic propor- tion of the third metal exceeds that of the mercury but does not exceed that of the sodium in the amalgam, and the atomic proportion of sodium is at least twice but not over four times that of the mercury.

506905

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