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 331
h are placed in machines that force the materialthrough a die so arranged as to give the desired diameter. Theforced carbons are often made with a core of some special material,this core being added after the carbon proper has been finished.The carbons, whether molded or forced, must be carefully… … Fig. 26. Distribution 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…
Electrical engineering
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