Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 211
200 ELECTRIC POWER AND CONSTRUCTION. … 751. ELECTRIC WELDING PLANT.— The secondary coil is the heavy bar ofcopper enclosing the primary coil towhich the clamps are attached. Themagnetic material is in the form of coils of iron wire wound around the primarycoil and copper hoop. * C, clamp arms. D, pieces to be welded.
Mechanical movements
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