Halogen incandescent lamp, particularly for operation from power networks, and method of its manufacture

A halogen incandescent lamp (1), particularly for connection to a network voltage supply of 80-250 V, 50-60 Hz, having

• a bulb (2) of transparent material defining a lamp axis,
• said bulb having two end portions (3, 4, 5) and bulb walls (2'),
• said bulb being closed at said end portions,
• wherein at least one of said end portions is closed by a pinch seal;
• current supply means passing through at least one of said end portions;
• a filament coupled to said current supply means, and positioned in said bulb in a predetermined location therein;
• a fill including an inert gas with a halide additive within said bulb;
• and
• a positioning means for said filament, wherein
• said positioning means comprises at least one protuberance means (9, 20, 21, 27, 30;
• 722, 824, 924, 1019, 1224, 1412, 1509a, 1509b, 1609, 1714, 1815, 1916, 2026) of said material extending transversely with respect to a plane passing through the lamp axis, from two spaced regions of the wall of the bulb (2) toward said plane passing through the lamp axis and positioning or helping to position said filament within said bulb.