Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 332
Curve for D. C. Arc Lampin Vertical Plane 296 ELECTRIC LIGHTING 33 different material seems to change the qiiaHty of hght and, beingmore readily volatilized, keeps the arc from wandering. Plating of carbons with copper is sometimes resorted to formolded forms for the purpose of increasing the… … Fig. 27. Distribution Curve for A. C. Arc Lamp in Vertical Plane is seen that the maximum amount of light is given off at an angle ofabout 50 degrees from the vertical, the negative carbon shutting offthe rays of light that are thrown directly downward from the crater.If alternating current is…
Electrical engineering
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