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US 2009/0153053 A1Published application
Low mercury ceramic metal halide lamp
AssigneeGeneral Electric Company
InventorAndrew Lawrence Podevels
Life of this patent
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Abstract
This disclosure relates to a low mercury content, metal halide lamp having a ceramic arc tube with an aspect ratio ranging from approximately 1.15 up to about 4.75, and having a fill in the arc tube of up to 2 milligrams of mercury per cubic centimeter and up to 10 milligrams of zinc metal and/or zinc/zinc iodide per cubic centimeter.
Claims8
A metal halide lamp comprising:
- a ceramic arc tube having an aspect ratio ranging from approximately 1.15 to approximately 4.75;
- a low mercury fill in the arc tube;
- and
- up to about 10 milligrams per cubic centimeter of zinc and/or zinc/zinc iodide.
1 more element
A low mercury ceramic metal halide lamp comprising:
- a ceramic arc tube having an arc chamber that receives first and second electrodes in spaced relation that define an arc length therebetween, and the arc tube chamber having a diameter, wherein the arc length divided by the diameter ranges from 1.15 to 4.75;
- and
- a fill including mercury in the range of approximately 2 milligrams per cubic centimeter and up to approximately 10 milligrams per cubic centimeter of zinc or zinc/zinc iodide.
A method of making a low mercury lamp comprising:
- providing a body having first and second electrodes spaced apart by an arc gap extending into a discharge chamber of a predetermined diameter formed in the body, wherein the body has an aspect ratio (defined as the arc gap divided by the diameter) on the order of approximately 1.15 to 4.75;
- introducing a fill in the discharge chamber having up to 2 milligrams per cubic centimeter of mercury;
- and
- adding up to 10 milligrams per cubic centimeter of zinc and/or zinc/zinc iodide to the fill.
1 more element
Dependencies are inferred from the claim text.