Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 439
m fine wires of a diameter of one-fiftieth of aninch up to heavy steel wire for the armour of submarine cables,and again up to street railway rail joints. In recent years, elaborate machinery, for the actual produc-tion on a large scale of steel tubing from flat stock or skelp by theprogressive… … WELDIXG M.U iii Xix.K n HKS OR SHELLS UP TO 16 INCHESIN DIAMETER. pass the heating current locally across the edges to weld them, andthe operation is progressive from one end of the pipe to the otheras it is fed into the machine. The result is a pipe of which thewalls are of even thickness and the…
Electrical engineering
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