Elizabeth A Guzowski

US Patent:

8049425, Nov 1, 2011

Filed:

Sep 29, 2009

Appl. No.:

12/569649

Inventors:

Gary Robert Allen - Chesterland OH, US
David C. Dudik - South Euclid OH, US
Viktor K. Varga - Solon OH, US
Robert Baranyi - Budaors, HU
Agoston Boroczki - Budapest, HU
Elizabeth A. Guzowski - Cleveland Heights OH, US
Jianwu Li - Solon OH, US
Rocco T. Giordano - Garfield Heights OH, US
Svetlana Selezneva - Schenectady NY, US
Amol S. Mulay - Karnataka IN, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

H01J 17/16

US Classification:

313634, 313 36, 313635

Abstract:

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 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.

US Patent:

20070057610, Mar 15, 2007

Filed:

Feb 28, 2006

Appl. No.:

11/363598

Inventors:

Gary Allen - Chesterland OH, US
David Dudik - South Euclid OH, US
Viktor Varga - Solon OH, US
Robert Baranyi - Budaors, HU
Agoston Boroczki - Budapest, HU
Elizabeth Guzowski - Cleveland Heights OH, US
Jianwu Li - Solon OH, US
Rocco Giordano - Garfield Heights OH, US
Svetlana Selezneva - Schenectady NY, US
Amol Mulay - Karnataka, IN

International Classification:

H01J 7/24
H01J 61/52
H01J 1/02

US Classification:

313017000, 313026000, 313634000

Abstract:

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 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.