PARTS OF A DYNAMO-ELECTRIC MACHINE 87 



Formed coils for use on c-c. machines are shown in Figs. 

 47 and 48. The ends of the coils are so bent that the 

 neighboring coils fit snugly against one another when they 

 are assembled on the armature core. 



FIG. 47. Typical Coils Used for a Lap Winding. Allis-Chalmers Co. 



In Fig. 47 the front connections of a coil are so formed 

 that they lie close together, such a coil is used for a lap 

 winding in which the two ends connect generally to adjacent 

 commutator bars. The front connections of the coils 

 shown in Fig. 48 are bent widely apart so these coils are 

 designed for a wave winding. 



