Direct current operable arc lamp

Details Direct current operable arc lamp Direct current operable arc lamp

H - Electricity

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J

313/132

H01J 61/073 (2006.01) H01J 61/36 (2006.01) H01J 61/82 (2006.01)

Patent

CA 1176298

D23,356 -5- DIRECT CURRENT OPERABLE ARC LAMP ABSTRACT A D.C. operable, miniature, low-wattage, single ended, arc discharge lamp. The cathode electrode includes electrical field modifying means to insure that the arc strikes between the electrode tips. During high pressure ( ? 10 atm) operation electrode heating of the anode is dominated by electron bombardment, which creates substantially higher heat at the anode tip than at the cathode tip (the cathode being heated by ion bombardment and cooled by thermionic electron emission). Heat conducted down the anode electrode is dissipated in the single press and contributes to the heat conduction in the closely adjacent cathode electrode thereby reducing the net heat loss therein and helping to maintain the desired cathode temperature.

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