General Electric Company

Laverne E Walsh

Curtis E Scott

Frederic F Ahlgren

Donald R Schindler

Rolf S Bergman

Ronald James Olwert

Gary L Price

An incandescent lamp containing a coiled filament within a vitreous envelope wherein the filament is supported at at least one point along its coil length by a refractory metal support wire one end of which is welded to a coil and the other end secured to the envelope wall by a glass bead. The support prevents filament sag during lamp operation and is especially useful with double-ended high intensity tungsten-halogen lamps having an elliptically shaped filament chamber with an infrared reflecting and visible light transmitting optical interference coating on the chamber.

Filament support for incandescent lamps

An electrically insulative base for an incandescent lamp is disclosed having a two-part construction with the individual base parts being joined together in butt-seal engagement along a horizontal plane transverse to the longitudinal lamp axis. Said base construction is especially useful in the tungsten halogen cycle lamps of the high wattage type requiring that a ceramic material be used and whereby the ceramic base parts are joined together before lamp assembly with a ceramic sealing material.

Incandescent lamp with ceramic base

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Chagrin Falls, OH, United States of America

Laverne E Walsh