Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 657
PHAROS-WELSBACH HIGH-PRESSURE LAMPS. In the last niimlxr of this journal itWas mentioned that a series of Pharos-Welsbach lamps were used outside theNational Gas Exhibition. The two illus-trations below show the general appearanceand details of construction of tliis lamp.The outstanding features… … Another point is the preheating of theprimary air by passing it over a corru-gated iron surface heated by the wastegases. At the same tiine there is nopossibility of the air entering the burnerbeing contaminated by the products ofcombustion. The parts of the lamp are
Lighting
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