Abstract: A multi-planar, one-piece wire insert for supporting a coil filament body in an electric incadescent lamp in which the wire insert includes a top leg disposed in a plane out of the main plane of the insert so as to permit the coil filament body, as wound, to fit (match) the insert directly without requiring alteration to the ends of the coil filament body and/or changing of the wound coil geometry.

Abstract: An improved electric lamp including an envelope of high silica glass material having a press sealed end wherein there is embedded a thin molybdenum foil which in turn forms part of the lamp's lead-in wire assembly. Crack formation in the area of the interface between the foil's external longitudinal surfaces and the compressed glass material is substantially prevented by providing the longitudinal sides of the foil with rough surfaces to assure substantial adhesion between the glass material and foil when the press sealed end is subjected to elevated temperatures (e.g., during pressing and/or subsequent lamp operation). These rough surfaces are provided by exposing the longitudinal sides of the foil to a sandblasting operation.