Patent ID: 6160341
Filing Date: 2000-12-12
Classification: H01K

Abstract:
An electric incandescent lamp (9), in particular a halogen incandescent lamp, having a rotationally symmetrical lamp bulb (2; 10) which has a longitudinal axis (RA) and an ellipsoidal partial contour (3) and in which a wall surface is provided with a layer (14) which reflects IR radiation, and having a rotationally symmetrical luminous element (4; 15) which is arranged axially inside the lamp bulb (2; 10) and held by means of two supply leads (16, 17), the two supply leads being guided outward in a gas-tight fashion on one or both sides of the lamp bulb by means of one (12) or, possibly, two seals, wherein the ellipsoidal partial contour of the lamp bulb (2; 10) is produced by a segment (3) of an ellipse whose semiminor axis b is orientated perpendicular to the longitudinal axis, that is to say perpendicular to the rotational axis (RA) of the lamp bulb (2; 10) and whose semiminor axis b is longer than the largest radius R of the lamp bulb.