Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 163
Fig. 150 Fk;. l..l Figs. 150 and 151.—Single-coil direct-current generators. zero points of one curve represents tlio time required by thecoil to pass the pole faces, or in Figs. 14G to 149 to make one-half revolution. The vertical distance between the line andthe curve at any point i-epresents the…
Electric machinery
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