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 403
Fig. 89. Spot-Welded Sheet Metal Joints. 1, 2, and S Show Sheet Steel Lap Welds; 4 Shows Section of Riveted Joint; and 6 Shows How Galvanized Iron Tears Around Spot ing, and this is today one of the principal uses of the system. Latera modification of the system w^as made in order that pieces of… … Fig. 90. Single Strap Butt Joint, Spot WeldedCourtesy of Toledo Electric Welder Company steel could be welded; this resulted in the development of the opera-tion known as spot welding, by means of which lapped joints can 362
Electrical engineering
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