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 465
ng Riser and Pouring Gate Casting Still Attached Courtesy of (Joldschmidt Thermit Company 421 128 WELDING heat of the reaction slightly, and this is done by adding small piecesof clean steel to the powder. These may be punchings, rivets, orany other soft steel pieces but must be free from grease to… … Fig. 131. Rolling Mill Ilou.sing Welded by Thermit ProcessCourtesij of GoUhchmidl Thermit Companij strength of the weld. If the manganese is not obtainable, a percent of ferromanganese may be added instead, although it increasesthe violence of the reaction and hardens the metal. Strength of the…
Electrical engineering
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