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 1074
Fig. 439 drum winding on a drum core. four coils and fourcommutator bars. for direct current … Fig. 440diagram of fig. 439 Any betterment of the magnetic conductivity of the frameof the machine will increase the electro-motive force; byproducing a greater flux per pound of copper on the fieldmagnets. Hence the winding of the armature inductors 1046 Steam Engineering (wires) on a core of very…
