Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Induction-type discharge device load
Reexamination Certificate
2000-07-14
2001-10-30
Philogene, Haissa (Department: 2821)
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Induction-type discharge device load
C313S493000, C313S113000, C313S116000
Reexamination Certificate
active
06310443
ABSTRACT:
BACKGROUND
1. Field of the Invention
The invention relates generally to discharge lamps. The invention relates more specifically to novel aperture structures. The present invention also relates to an improved electrodeless aperture lamp, and to an improved method of manufacturing an electrodeless aperture lamp.
2. Related Art
In general, the present invention relates to the type of lamp disclosed in U.S. Pat. No. 5,903,091, which is herein incorporated by reference in its entirety.
Electrodeless lamps are known in the art. Such lamps may be characterized according to the type of discharge they produce. Electrodeless discharges may be classified as either E discharges, microwave discharges, travelling wave discharges, or H discharges. The present invention may be effectively utilized with any of these types of discharge lamps, as well as electroded arc discharge lamps.
A number of parameters characterize highly useful sources of light. These include spectrum, efficiency, brightness, economy, durability (working life), and others. For example, a highly efficient, low wattage light source with a long working life, particularly a light source with high brightness, represents a highly desirable combination of operating features. Electrodeless lamps have the potential to provide a much longer working life than electroded lamps. However, low wattage electrodeless lamps have found only limited commercial applications.
SUMMARY
According to one aspect of the invention, 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. For example, the reflective ceramic material substantially fills an interior volume of the ceramic cup not occupied by the bulb.
According to another aspect of the invention, the ceramic cup comprises a structural feature for aiding in alignment of the jacketed lamp bulb envelope in a lamp. For example, the structural feature comprises a protrusion adapted to mate with a corresponding slot in the lamp. Alternatively, the structural feature comprises an indexing feature adapted to mate with a corresponding feature in the lamp. Alternatively, the structural feature comprises a rim adapted to mate with a corresponding shoulder in the lamp. Alternatively, the structural feature comprises a raised portion on an exterior of the ceramic cup in the area of the aperture, the raised portion being adapted to be readily grasped for positioning the ceramic cup. The ceramic cup may also include a combination of the foregoing structural features.
According to another aspect of the invention, the ceramic cup comprises a external flange about a periphery thereof. For example, the flange may be located proximate the open end of the ceramic cup. Alternatively, the flange may be located proximate the partially closed end of the ceramic cup.
According to another aspect of the invention, 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.
According to another aspect of the invention, 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.
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Bass Gary K.
Dolan James T.
Gitsevich Aleksandr
Kipling Kent
Kirkpatrick Douglas A.
Fusion Lighting Inc.
Philogene Haissa
Steiner Paul E.
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