Method and apparatus for introducing mercury into arc...

Details Method and apparatus for introducing mercury into arc... Method and apparatus for introducing mercury into arc...

H - Electricity

01

J

H01J 61/44 (2006.01) H01J 9/395 (2006.01) H01J 61/28 (2006.01)

Patent

CA 2091470

LD 10202 METHOD AND APPARATUS FOR INTRODUCING MERCURY INTO ARC DISCHARGE LAMPS ABSTRACT OF THE DISCLOSURE An alumina sphere having a porous wall structure and a cavity within is employed to introduce mercury into an arc discharge lamp, such as a fluorescent lamp. Mercury is introduced into the ceramic sphere by subjecting the sphere to reduced pressure, surrounding it with liquid mercury and increasing the pressure to force the mercury inside. The mercury-containing sphere is then introduced into the exhaust tube of the lamp before it is sealed. Heat or a combination of heat and reduced pressure is used to drive the mercury out of the sphere and into the interior of the lamp.

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