General Electric Company

Walter K Brinn

Milan R Vukcevich

John M Davenport

Elmer G Fridrich

Charles W Cox

Ivan Berlec

Stephan Rungwerth

The subject invention relates to a copper-steel composite wire suitable for use as inner lead wires in lamp applications. The subject copper-steel composite wire comprises a steel core having a thick copper cladding on the outside thereof such that the composite lead wire exhibits at least 30% IACS electrical conductivity. The application further relates to the use of the subject composite wire in incandescent lamp applications.

Copper-steel composite lead wire and use in incandescent filament

An improved high efficiency general service incandescent lighting unit is disclosed. The lamp has coaxial outer and inner envelopes. The inner envelope has a low voltage filament coaxially disposed therein, a halogen gas atmosphere and a fill-gas at a high pressure. The outer envelope has a coating of a light transmissive reflective infrared film on its inner surface. Further disclosed are various control systems for reducing a typical 120 v. A.C. voltage and applying the reduced A.C. or D.C. voltage across the low voltage filament within the inner envelope.

Higher efficiency incandescent lighting units

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Shaker Heights, OH, United States of America

Walter K Brinn