Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 935
y. A powerfulscrew and spring at Z J forces the clamps together wlu-nthe apparatus is used. Over both prinuiryand secondarya heavy sheatliing of iron wire is wound, forming vir-tually an endless magnetic circuit of iron around them.The iron wire is wound upon a casing which encloses thetwo coils, P… … rrents. of comparatively high potential, passing in theimary circuit,7^ generate in the bar, A, when its circuit Fig. 1.—Electric welding machine. pri . is closed by pieces, B B\ to be welded, a low electro-motiveforce acting over a circuit of very low resistance, andgiving rise therein to currents…
Mechanical engineering
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