High pressure sodium lamp having improved pressure stability

Details High pressure sodium lamp having improved pressure stability High pressure sodium lamp having improved pressure stability

H - Electricity

01

J

313/133

H01J 61/06 (2006.01) H01J 1/14 (2006.01) H01J 61/073 (2006.01)

Patent

CA 1249015

HIGH PRESSURE SODIUM LAMP HAVING IMPROVED PRESSURE STABILITY ABSTRACT OF THE DISCLOSURE High pressure sodium lamps nave been subject to progressive reduction in pressure of contained sodium with attendant reduction in lighting quality. It has now been discovered that modification of lamp components permits the pressure of contained sodium to be maintained at higher levels. Emission materials enclosed within the lamp are altered to limit reactive oxygen in the lamp atmosphere. A thermionic electrode is equipped with an improved emission mix composition as illustrated in areas B and C of the triaxial plot of Figure 3.

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