Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1990-12-17
1992-10-27
O'Shea, Sandra L.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313571, 313639, H01J 6112, H01J 6120
Patent
active
051592290
ABSTRACT:
A metal halide high intensity discharge lamp including a carbon monoxide additive in the arc tube fill to improve lumen maintenance is provided. The metal halide discharge lamp of the present invention comprises: an outer sealed glass envelope; a pair of electrical conductors sealed into and passing through the glass envelope; an arc tube disposed within the outer glass envelope, the arc tube including a pair of spaced electrodes therein with the electrodes being electrically connected to the electrical conductors such that one electrode is electrically connected to one electrical conductor; a chemical fill disposed within the arc tube, the chemical fill comprising mercury, metal halide additives, carbon monoxide, and a starting gas; and a support structure disposed within the outer glass envelope to support the arc tube therein.
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patent: 5021703 (1991-06-01), Passmore
Keeffe William M.
Passmore Edmund M.
GTE Products Corporation
O'Shea Sandra L.
Walter Robert E.
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