Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1080
e armatureand is calculated by this rule: P. S. equals 3.1416 x D x E. P. M. where D is the di-ameter of armature in feet and E. P. M. is the revolutionof the armature per minute. The Dynamo 1045 hands of a watch when viewed from the commutator end ofthe machine; then the electro-motive forces… … Fig. 439 drum winding on a drum core. four coils and foub commutator bars. for direct current s N^ ^ V /■ T y i > / B ._/ N s ^ s Fig. 440 DIAGRAM OF FIG. 439 Any betterment of the magnetic conductivity of the frameof the machine will increase the electro-motive force; byproducing a greater flux…
