100. ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 
providing that it is obtained by omitting the phase winding 
of Figs. 47 to 49 or leaving empty the slots of the two 
phases in the Figs. 50 to 52. 
. Fies. 50, 51 aND 52.—THREE-PHASE WINDINGS. 
175. Ratio Between Coil Breadth and Pole Pitch.— 
For illustrating the meaning of ratio between coil breadth 
and pole pitch, take for instance, the value of } column 2, 
Table 14, which is obtained by measuring the pole pitch 
with the 9 slot pitches and the coil breadth by the 2 slot 
pitches, which are located between the 3 coils of one side. 
Figs. 58, 54 aND 55.—SINGLE-PHASE WINDINGS. 
176. Ratio Between Pole Are and Pole Pitch,—As 
regards the ratio of pole arc to pole pitch, it should be 
noted that the values 4, %, Table 14, are applicable 
to the alternate poles of a revolving field type alternator, 
