Practical electricity .. with questions and answers (1911)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 76
go. The prevailing style for large machines at thepresent time has the multipolar field and ironclad armature. The ironclad armature is well adapted for all sizes ofmachines, while the multipolar construction is especiallyadvantageous in machines of large output, but for machinesof less than 10 H.… … Figure 29Smooth core armature. 66 The chief reason tha.t ironclad armatures have comeinto use is that by means of this device the magnetic re-sistance of the air gap is very much reduced. The practical effect of the introduction of the ironcladarmature is to make the carrying capacity of the iron…
Electricity
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