William C Trimble

US Patent:

63104431, Oct 30, 2001

Filed:

Jul 14, 2000

Appl. No.:

9/616995

Inventors:

Donald A. MacLennan - Gaithersburg MD
Brian P. Turner - Damascus MD
Aleksandr Gitsevich - Gaithersburg MD
Gary K. Bass - Mt. Airy MD
James T. Dolan - Frederick MD
Kent Kipling - Gaithersburg MD
Douglas A. Kirkpatrick - Great Falls VA
Yongzhang Leng - Damascus MD
Izrail Levin - Silver Spring MD
Robert J. Roy - Frederick MD
Bruce Shanks - Gaithersburg MD
Malcolm Smith - Alexandria VA
William C. Trimble - Columbia MD
Peter Tsai - Olney MD

Assignee:

Fusion Lighting, Inc. - Rockville MD

International Classification:

H05B 4116

US Classification:

315248

Abstract:

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.

US Patent:

63135876, Nov 6, 2001

Filed:

Nov 5, 1999

Appl. No.:

9/434310

Inventors:

Donald A. MacLennan - Gaithersburg MD
Lauren E. Dymond - North Potomac MD
Aleksandr Gitsevich - Montgomery Village MD
William G. Grimm - Silver Spring MD
Kent Kipling - Gaithersburg MD
Douglas A. Kirkpatrick - Great Falls VA
Samuel A. Ola - Silver Spring MD
James E. Simpson - Gaithersburg MD
William C. Trimble - Columbia MD
Peter Tsai - Olney MD
Brian P. Turner - Damascus MD

Assignee:

Fusion Lighting, Inc. - Rockville MD

International Classification:

H05B 4116

US Classification:

315248

Abstract:

A high frequency inductively coupled electrodeless lamp includes an excitation coil with an effective electrical length which is less than one half wavelength of a driving frequency applied thereto, preferably much less. The driving frequency may be greater than 100 MHz and is preferably as high as 915 MHz. Preferably, the excitation coil is configured as a non-helical, semi-cylindrical conductive surface having less than one turn, in the general shape of a wedding ring. At high frequencies, the current in the coil forms two loops which are spaced apart and parallel to each other. Configured appropriately, the coil approximates a Helmholtz configuration. The lamp preferably utilizes an bulb encased in a reflective ceramic cup with a pre-formed aperture defined therethrough. The ceramic cup may include structural features to aid in alignment and I or a flanged face to aid in thermal management. The lamp head is preferably an integrated lamp head comprising a metal matrix composite surrounding an insulating ceramic with the excitation integrally formed on the ceramic.