Electric lamp with electrolysis preventing apparatus

摘要

An electric lamp having a lamp envelope transmitting radiation which is sealed in a vacuum-tight manner at least one end by means of a pinch in which at least two current lead-through conductors are sealed. An electric voltage comprising a direct voltage component is present between these conductors during operation of the lamp. A metal scrreming element is placed in the pinch between the two current lead-through conductors. The screening element is connected to the current lead-through conductor which has as an average a negative potential relative to the other current lead-through conductor during operation so that the drawbacks of electrolysis phenomena in the pinch are eliminated.