6o 



ELEMENTS OF ELECTRICAL ENGINEERING. 



the armature core, and the space between the armature core and 

 the commutator at the other end, see Fig. 46, are for receiving 

 the overlapping ends of the armature coils. Both of these spaces 



163-A 



Fig. 49. 



are left more or less open, so that the cool air may be drawn in 

 at one end of the rotating armature and driven out through the 

 overlapping ends of the coils, as shown by the arrows in Fig. 50. 



Fig. 50. 



