SU62108A1 - Getter for electric incandescent bulbs - Google Patents

Description

The role of the getter in incandescent electric lamps is to remove from the gas phase small amounts of oxygen and Boda vapor released as the lamp burns from the walls of the bulb, electrodes and filament.

The substances used for this purpose nowadays in many cases do not give a satisfactory effect for a number of reasons. So, carbon, has good getter properties, together with the brittleness of tungsten filaments, which makes this application for a number of lamp grades highly undesirable. Red phosphorus also has good properties, but it requires extremely accurate dosage, since with a lack of phosphorus the lamines turn black, and with an excess of phosphorus it sits on the walls of the flask, which lowers the light output.

It is now proposed to use complex compounds of synergistic salts as getters, which have a number of advantages over the getters currently used. These compounds are applied to the filament, electrodes, rod or kaolin bridges in the event that the latter are in the lamp. The action of complex synergistic salts, like getters, is based on their decomposition when heated, with the release of metals. So, the decay of K., Fe (C; V), formed metallic potassium, metallic iron, carbon and nitrogen. Placed on the cold parts of the flask, metallic potassium and iron perfectly absorb oxygen and water vapor. A number of complex compounds of synergistic salts containing in the complex anion Fe, Ni, Co, Mn, Cr, Zn, A1 and other metals with the cations K, Na, Li, Be, Co, Sr, Ba, Mg, have good gettering properties Al et al.

Subject invention

Getter for electric incandescent lamps, characterized in that it consists of a complex synergistic salt.