Electric lamp and discharge devices – With gas or vapor – Having particular electrode structure
Patent
1992-07-08
1994-10-18
O'Shea, Sandra L.
Electric lamp and discharge devices
With gas or vapor
Having particular electrode structure
313344, H01J 1710, H01J 6106
Patent
active
053571673
ABSTRACT:
A high pressure discharge lamp with a thermally improved anode, as well as a method of making such a lamp, are disclosed. The lamp includes a refractory arc tube with a hermetically sealed arc chamber, a fill in the arc chamber for facilitating light generation, and an anode and a cathode extending into the hermetically sealed arc chamber and being spaced apart from each other. The anode comprises a shank of refractory metal, a cylindrically shaped refractory metal sleeve on a portion of the shank, and an end proximally facing the cathode. The anode end comprises a substantially solid mass of refractory metal, and is integrally joined to both the shank and the metal sleeve to facilitate heat flow from the anode end to the shank and sleeve. The anode end preferably is generally shaped as a hemisphere facing the cathode. The refractory metal sleeve is preferably one or more layers of a helically wound refractory metal wire having an outer diameter more than twice a diameter of the shank.
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Allen Gary R.
Dever Timothy P.
Giordano Rocco T.
Johnson Jeffrey D.
Mathews Paul G.
Corwin Stanley C.
General Electric Company
Hawranko George E.
O'Shea Sandra L.
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