Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1197
ts of only a single loop with two conductors^ a coil mayconsist of a number of turns of wire, in which case the 1168 Steam Engineering drawing indicates merely the connections for the beginningand end of each coil. As has been previously explained, the conductor whichpasses from the front to the… … Fig. 518 spaces to the right or left of 9. The expression for deter-mining the proper spacing for the return conductor is: i(^-\ where y=spacing or pitch, n==number of poles, z=number of conductors, bi=number of conductors to a coil.The symbol + means simply, plus or minus, that it is op-tional…
