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Jacketed lamp bulb envelope

United States Patent

6,310,443
October 30, 2001
View the Complete Patent at the US Patent & Trademark Office
A jacketed lamp bulb envelope includes a ceramic cup having an open end and a partially closed end, the partially closed end defining an aperture, a lamp bulb positioned inside the ceramic cup abutting the aperture, and a reflective ceramic material at least partially covering a portion of the bulb not abutting the aperture. The reflective ceramic material may substantially fill an interior volume of the ceramic cup not occupied by the bulb. The ceramic cup may include a structural feature for aiding in alignment of the jacketed lamp bulb envelope in a lamp. The ceramic cup may include an external flange about a periphery thereof. One example of a jacketed lamp bulb envelope includes a ceramic cup having an open end and a closed end, a ceramic washer covering the open end of the ceramic cup, the washer defining an aperture therethrough, a lamp bulb positioned inside the ceramic cup abutting the aperture, and a reflective ceramic material filling an interior volume of the ceramic cup not occupied by the bulb. A method of packing a jacketed lamp bulb envelope of the type comprising a ceramic cup with a lamp bulb disposed therein includes the steps of filling the ceramic cup with a flowable slurry of reflective material, and applying centrifugal force to the cup to pack the reflective material therein.
MacLennan; Donald A. (Gaithersburg, MD), Turner; Brian P. (Damascus, MD), Gitsevich; Aleksandr (Gaithersburg, MD), Bass; Gary K. (Mt. Airy, MD), Dolan; James T. (Frederick, MD), Kipling; Kent (Gaithersburg, MD), Kirkpatrick; Douglas A. (Great Falls, VA), Leng; Yongzhang (Damascus, MD), Levin; Izrail (Silver Spring, MD), Roy; Robert J. (Frederick, MD), Shanks; Bruce (Gaithersburg, MD), Smith; Malcolm (Alexandria, VA), Trimble; William C. (Columbia, MD), Tsai; Peter (Olney, MD)
Fusion Lighting, Inc. (Rockville, MD)
09/ 616,995
July 14, 2000
Certain inventions described herein were made with Government support under Contract No. DE-FC01-97EE23776 awarded by the Department of Energy. The Government has certain rights in those inventions.