A LAMP WITH QUARTZ BULB AND ELECTRODE RODS HAVING LONGISH GROOVES

摘要

An electric lamp provided with a bulb (1) of quartz glass and a metal electrode rod (3;21,22). The electrode rod (3;21,22) is at least partly embedded in the quartz glass material of the bulb. At least a major part of the surface of the electrode rod (3;21,22) that is in contact with the quartz glass material is provided with grooves (6) that tun parallel to the longitudinal axis of the electrode rod.