High temperature lamp starting aid

Details High temperature lamp starting aid High temperature lamp starting aid

H - Electricity

05

B

315/50, 313/7

H05B 41/08 (2006.01) H01J 61/54 (2006.01)

Patent

CA 1060535

ABSTRACT OF THE DISCLOSURE A high pressure sodium vapor lamp utilizing an alumina ceramic arc tube within an outer glass envelope is provided with a capacitive starting aid on the outside of the arc tube. The starting aid comprises a pair of thermally deformable bimetal arms whose ends embrace the arc tube at room temperature to provide a capacitive effect. The bimetal arms swing away from the arc tube when heated up under op- erating conditions in order to reduce the obstruction of light and prevent overheating of the arc tube wall.

219864

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