ALTERNATING GENERATORS AND SYNCHRONOUS MOTORS. 99 
the pole pitch. Further, secondary influences are: the 
saturation of the teeth and hysteresis in the same. The 
better the coils are distributed, the nearer will the wave 
form be to that of a sine curve. 
174. Form Factor with Long Coils.— For windings with 
long coils as now adopted, Table 14 gives the different 
values of the form factor. 
The definition of a long coil is, that the mean distance be- 
tween the sides of a coil shall be exactly, or approxi- 
mately, equal to the distance between successive poles, 
which is: a+n= T, (see Fig. 42). 
L449. 
Figs. 47, 48 anD 49.—Two-PHASE WINDINGS. 
Column 1 of Table 14 represents the form factor values for 
the symmetrical bar winding, with so many slots per pole 
and phase that the winding is electrically equivalent to 
a smooth winding. . 
‘Column 2 gives the data corresponding to the two and three 
phase windings of the Figs. 47 to 52. The same values 
also hold good for a single phase armature, Figs. 53 to 58, 
