Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1173
ent does not have a constantfixed value, as in the direct current system, but is contin-ually changing in amount, and alternating in the directionof pressure at equal, regular intervals of time. Eeferenceto Fig. 496 will serve to explain the action of the alternat-ing electro-motive force within… … Fig. 496sine curve of generating circle. of the vertical lines correspond to the distance of points ofthe curve from the horizontal or zero line. The left handquadrant of the generating circle is divided into angles of22y2° or one sixteenth of a circumference. For each anglelines are drawn, such as…
