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AssigneeGeneral Electric Company
InventorsRonald J. Olwert, Frederic F. Ahlgren, Laverne E. Walsh, Donald R. Schindler, Rolf S. Bergman, Gary L. Price, Curtis E. Scott
Estimating the term…
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.
An incandescent lamp comprising a light transmissive, vitreous envelope, said vitreous envelope having a filament chamber formed therein enclosing a filament constructed as a continuous coiled coil having a plurality of primary coils formed along a length of refractory metal and a plurality of larger secondary coils formed by coiling said length of primary coils, said filament being supported within said envelope by means of at least one refractory metal filament support welded to a portion of said plurality of primary coils on one of said secondary coils of said filament.
An incandescent lamp comprising a light transmissive vitreous envelope having a filament chamber which has a linear optical axis and which encloses within a linear filament constructed as a continuous coiled coil having a plurality of primary coils formed along a length of refractory metal and a plurality of larger secondary coils formed by coiling said length of primary coils and whose linear axis is coincident with said linear optical axis of said filament chamber, with said filament supported within said chamber by means of at least one refractory metal filament support, with one part of said support welded to a portion of said plurality of primary coils on one of said secondary coils of said filament and another part of said support attached to a bead of vitreous material which has been melted to said another part of said support and fused to the inside surface of said filament chamber.
A filament assembly comprising a continuous coiled coil filament constructed having a plurality of primary coils formed along a length of refractory metal and a plurality of larger secondary coils formed by coiling said length of primary coils and with at least one refractory metal support welded to a portion of said plurality of primary coils on one of said secondary coils of said filament.
A double-ended halogen-incandescent lamp comprising a vitreous, light-transmissive envelope having a double-ended filament chamber of a predetermined generally elliptical shape having two ends and terminating at each of said ends in an elongated tubular portion having a diameter smaller than the diameter of said chamber, wherein said chamber has a linear optical axis and is coated with an infrared-reflecting and visible light-transmitting coating, said chamber enclosing within a linear continuous filament having a plurality of primary coils formed along the length thereof and a plurality of secondary coils formed by coiling said length of primary coils and one or more halogen compounds and inert gas, wherein said filament is aligned in said chamber with its longitudinal axis coincident with said optical axis of said chamber, said filament supported within said chamber by means of at least one refractory metal support welded to a portion of said plurality of primary coils on one of said secondary coils of said filament and wherein a vitreous bead is melted to said support and to the interior surface of said chamber to support said filament within said chamber.
A double-ended halogen-incandescent lamp comprising:
Dependencies are inferred from the claim text.