i 5 6 



ELEMENTS OF ELECTRICAL ENGINEERING. 



directions in Figs. 103 and 104, and therefore the resultant flux 

 density under these tips is small, as shown in Fig. 105. 



Fig. 104. 



Fig. 1 06 shows a multipolar machine with the brushes at 

 an angle a ahead of the diagonal lines AB* The conductors 

 at a greater angular distance than a from the line AB bal- 

 ance each other's magnetizing action on the magnetic circuit, the 

 mean path through which is shown by the heavy dotted line <l>. 



* Which bisect the angles between the lines CD which are drawn from the cen- 

 ter of the armature to the middle points of the pole pieces. 



