Gte Products Corporation

Stephen F Kimball

Peter R Gagnon

Robert M Griffin

Emery G Audesse

A tungsten-halogen electric lamp having permeable means closing an outer envelope. Such non-hermetic means may be relatively free-breathing or weather-tight. Tungsten-halogen lamps with permeable means may be manufactured more simply and economically than those currently available.

Tungsten-halogen electric lamp with permeable means closing an outer

This invention provides a tungsten-halogen lamp having a thin-wire filament and a hydrogen-impervious envelope. Containment of hydrogen within the lamp envelope suppresses tungsten corrosion of the filament and prevents early termination of the lamp. In the preferred embodiment, an aluminosilicate glass is employed as the hydrogen-impervious envelope material. This invention overcomes a substantial impediment in the development of a feasible tungsten-halogen lamp as a replacement for the standard Edison-type lamp for general lighting purposes.

Tungsten halogen lamp having a fine-wire filament and a

Tungsten halogen incandescent lamps comprise tungsten filaments having different tungsten evaporation rates during normal operation. The filaments are supported on lead-in wires made of an alloy including tantalum.

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No. Andover, MA, United States of America

Stephen F Kimball