General Electric Company

Robert Baranyi

Agoston Boroczki

Gary Robert Allen

Jianwu Li

David C Dudik

Viktor Karoly Varga

Svetlana Selezneva

Rocco T Giordano

Amol S Mulay

Elizabeth A Guzowski

Bernard Patrick Bewlay

Bruce Alan Knudsen

Mohamed Rahmane

James Scott Vartuli

James Anthony Brewer

Istvan Csanyi

A lamp is provided having an arctube having a light-transmitting envelope. The arctube is surrounded by a gaseous medium confined by a containment envelope such as a hermetic shroud. The gaseous medium is preferably He or Hor Ne or another gas whose thermal conductivity is greater than that of Nat 800&#xb0; C., or a mixture thereof, to help cool the arctube. The inside and/or outside of the shroud may be coated with a diffusion barrier. To help cool the hot spot of the arctube the gap between the shroud and the envelope can be made small, the portion of the shroud wall near the arc can be thickened, the arctube can be offset above the longitudinal axis of the shroud, and the return lead of the arctube can be located between the shroud and the arctube.

Gas-filled shroud to provide cooler arctube

A lamp having a ceramic arc envelope, an end structure coupled to the ceramic arc envelope and extending across an opening in the ceramic arc envelope, where the end structure comprises a passageway communicative with an interior chamber of the ceramic arc envelope is provided. The lamp further includes a molybdenum-rhenium electrode lead extending through and sealed with the passageway. The molybdenum-rhenium electrode lead includes a molybdenum-rhenium alloy. Furthermore, the lamp includes an arc electrode tip coupled to the electrode lead inside the interior chamber.

Ceramic lamps and methods of making same

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Budaors, Hungary

Robert Baranyi