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 464
d gate will vary somewhatfor different jobs and the relation between weight of wax and mix-ture will vary accordingly, but the ratio of 32 to 1 is a goodaverage. It is necessary to preheat the article at the joint until itis red-hot before starting to pour the metal, and this is done withthe… … Fig. 130. T.vpical Thermit Weld Showing 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…
Electrical engineering
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