LUMINOUS LAMP WITH A TUBE FOR ELECTRIC DISCHARGE IN HIGH PRESSURE MERCURY VAPOURS

摘要

The invention relates to a lamp with a tube (1) for the electric discharge in high pressure mercury vapours, said tube being located inside a vacuumed glass flask (2) and provided with an adhering phosphorus layer (a). The tube (1) has a concentric construction generating ultraviolet radiations by means of a cylindrical plasma crown with mercury vapours, said crown being defined by the volume between the concentric quartz pipes (14) and (15) and the closures at the ends of pipes provided with some main electrodes (4) and (5) and an igniting electrode (6)