Abstract: In electric lamps according to the invention the alkali-alumino-borosilicate glass of the pinch seal of the lamp envelope is directly fused to the molybdenum current supply wire of diameter D. A vacuum-tight seal is obtained in that the glass inside the lamp envelope extends over the current supply wire in a layer which is thinner than D/2 at least over a length of D/2. For use in both incandescent and discharge lamps.

Abstract: Electric lamps having a simple, strong and reliable current lead-through construction according to the invention have, on a tungsten lead-through conductor, a first glass layer on which and between the ends of which a second glass layer is provided. The wall of the lamp vessel is fused to the second layer. Glasses having at least 95% by weight of SiO.sub.2 are used for the layer and also for the wall of the lamp vessel.

Abstract: Halogen incandescent lamps having at least two filaments are provided with a hard-glass lamp vessel. In the vacuum-tight seal of the vessel molybdenum wire current leadthrough conductors are incorporated which form one assembly with internal and external current conductors. In spite of large differences between the coefficients of expansion of the glass and the molybdenum, the lacking of rotationally symmetric geometry at the area of the current leadthroughs and the high thermal load of the lamp vessel seal, the lamps have proved to be very reliable.