Fusion Lighting, Inc.

Bruce Shanks

Brian P Turner

James T Dolan

Douglas A Kirkpatrick

Donald A MacLennan

Yongzhang Leng

Kent Kipling

Izrail Levin

Malcolm Smith

Peter Tsai

Aleksandr Gitsevich

Robert J Roy

Gary K Bass

William C Trimble

Thomas L Sumner

A discharge lamp for providing visible radiation includes a lamp envelope which is made of light transmissive material a fill in the envelope including either calcium halide or strontium halide together with either elemental sulfur or elemental selenium in gaseous form which is obtainable when the fill is excited by sufficient power in operation, in an amount such that the excited fill emits a discharge of visible radiation from the fill with substantially all of the radiation being molecular radiation which is emitted in the visible region of the spectrum. The calcium halide or strontium halide operates at a vapor pressure which provides a significant amount of radiation in the red region of the spectrum therefrom and the overall spectrum has a color rendering index of about 87 or more.

Lamp with improved color rendering

An arc discharge lamp includes a light transmissive envelope (,), two electrodes (,) disposed at least partially inside the light transmissive envelope, and a plasma forming fill which includes selenium when excited disposed inside the light transmissive envelope (,). The exterior surfaces of the part of the electrodes (,) disposed inside the light transmissive envelope (,) comprise an electrode material selected from the group of molybdenum and molybdenum compounds.

Electroded selenium lamp

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.

Jacketed lamp bulb envelope

An integrated lamp head for an electrodeless lamp includes a metal-matrix composite enclosure, an insulating ceramic encased by the metal-matrix enclosure, the insulating ceramic having an interior surface, and an excitation structure integrally formed on the interior surface of the insulating ceramic. The excitation structure may include an excitation coil such as a wedding ring shaped excitation coil or a coil having a cross sectional shape similar to an upper-case Greek letter omega. The integrated lamp head optionally includes a pre-formed connection from an exterior portion of the integrated lamp head to the excitation structure and/or a conductive insert in an area of a solder connection point.

Metal matrix composite integrated lamp head

An improved electrodeless discharge lamp bulb includes an integral ceramic reflector as a portion of the bulb envelope. The bulb envelope further includes two pieces, a reflector portion or segment is cast quartz ceramic and a light transmissive portion is a clear fused silica. In one embodiment, the cast quartz ceramic segment includes heat sink fins or stubs providing an increased outside surface area to dissipate internal heat. In another embodiment, the quartz ceramic segment includes an outside surface fused to eliminate gas permeation by polishing.

Lamp bulb with integral reflector

An inexpensive and reliable method and apparatus for selectively coupling the bulb stem of an electrodeless lamp to a rotatable drive shaft does not require side access to a set screw or an RF sealing arrangement. The coupler accommodates angular and eccentric misalignment of threadedly engageable members at relatively low manufacturing costs. A cylindrical coupler connected to the bulb stem is provided with a cylindrical cross-hole extending diametrically through and exposing the proximal end of the bulb stem in the longitudinal bore. A seating lock nut of generally rectangular configuration, and having a pair of opposite compressible turned out comers or 'wings', is insertable through the cross-hole and is loosely retained at the intersection of the bore and cross-hole. The seating lock nut is sized, relative to the cross-hole and longitudinal bore, such that, upon being released within the cross-hole, the lock nut is loosely retained. The distal tip of the drive shaft is pointed to facilitate its entry into threaded aperture formed by bendable tongue members of the loosely retained seating lock nut. Rearwardly of its pointed end, the drive shaft is threaded to engage the nut threaded aperture. The resilient metal seating lock nut tends to deform at its bent tongues when the shaft threaded segment 'bottoms out' during insertion. This deformation provides a locking function, causing the motor shaft to pull on the tongues of the lock nut, resulting in the elimination of any clearance between the two threaded members and thus creating a compressive pre-stress on the overall joint.

Growing community of inventors

Gaithersburg, MD, United States of America

Bruce Shanks