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 518
into the coil without causing it to pass between moving surfaces,the relations of which might constantly change in conditions of wear, in which case theresistance to the coil at this point might be of unknown and variable quantity. Leading thecurrent in through the springs, entirely overcomes any… … Fig. 2.—Weston electric gauge. 494 MEASURING INSTRUMENTS, ELECTRICAL. especially when the need was understood of an index which should, despite these quickchanges in the current, move steadily to its reading and there stand. Alternating cur-rents have hitherto usually been measured indirectly, as…
Mechanical engineering
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