General Electric Company

Daniel Polis

Vishal Gauri

David C Dudik

Matthew Bugenske

Carolyn E Wilson

A high intensity discharge lamp assembly ( ) has improved thermal venting. The discharge light source ( ) is housed within a reflector body ( ). Recesses ( ) are circumferentially spaced around an open end ( ) of the reflector body. A containment structure ( &Prime;) provides a structure that serves the containment function without interfering with the thermal venting.

Discharge lamp with vented reflector

A binder system for forming a ceramic body, such as a translucent arc tube for a metal halide lamp, comprises a hydrocarbon, such as a paraffin wax, a copolymer, such as poly (ethylene-co-vinyl acetate), and optionally a surfactant. The binder system is mixed with a ceramic powder and heated to above the melting point of the binder. The heated mixture is formed into a compact having the general shape of the finished ceramic body and then cooled or allowed to cool. The hydrocarbon and copolymer have overlapping freezing points so that when the shaped compact cools, crystalline segments of the copolymer (such as ethylene segments) co-crystallize with the hydrocarbon, while amorphous segments (such as vinyl acetate) form bridges between the crystalline regions. As a result, the cooled compact has improved green strength over conventional binder systems.

Binder system for ceramic arc discharge lamp

A suspension adhesive comprised of a matrix material and a particulate filler material is useful for bonding, sealing, repairing, and modifying ceramic, glass, and powdered metal components in a light source. A method for making the suspension adhesive includes the selection of a filler material and a volume percentage of the filler material. Additionally, a matrix material is selected and the filler material is dispersed throughout the matrix material. The suspension adhesive is used to bond and seal components to form, for example, an arc tube for a light source.

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Cleveland Heights, OH, United States of America

Daniel Polis