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US 5,486,737 AGranted
Heavily loaded double-ended arc lamp
AssigneeOsram Sylvania Inc.
InventorsDavid M. Hrubowchak, Nanu Brates
Life of this patent
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Abstract
A highly loaded, double ended arc lamp has a cylindrical arc chamber with a volume of 56 cc and an arc length of 108 mm. The metal halide fill is limited to amount below 0.6 mg/cc and comprises HgI.sub.2 ; NaI/CsI in a 6:1 weight ratio; and scandium metal. The 2000W lamp is employed for stadium lighting.
Claims6
A double-ended arc lamp having an overall length equal to X;
- an arc chamber having a volume of about 56 cc and which is cylindrical for a greater part of its length;
- an arc length equal to about 42%X;
- an overall arc chamber length of about 50%X;
- a maximum arc chamber inside diameter of about 10%X;
- and a pair of press seals each having a length of about between 10%X to 11%X.
2 more elements
Dependencies are inferred from the claim text.