HOGEDRUK-NATRIUMDAMPONTLADINGSLAMP.

摘要

1330958 Discharge lamps PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 21 April 1971 [24 April 1970] 10469/71 Heading H1D A high pressure sodium vapour discharge lamp consists of a discharge tube 1 of densely sintered aluminium oxide and an outer envelope 4, the space between the tube and the envelope being filled with an inert gas at a pressure exceeding 200 Torr. The inert gas may be a rare gas e.g. argon at 700 torr or nitrogen and the envelope 4 may be quartz. Members 7 and 15 act as connecting wires and centring devices for the discharge tube. The lamp is preferably operated so that W/A # 22, where W is the power in watts and A is the inner surface area of the discharge tube in sq. cm.