WINDING OF CONTINUOUS-CURRENT ARMATURES 297 



the commut.'itor lugs. At the top of the armature the view shows 

 the wedges being inserted for holding the coils into the mouth of 

 the slots. 



Fig. 354 is the armature of a 30-h.p. crane motor. Here half 

 of the coil ends are brought down to the commutator, and the 

 other half bent up out of the way ready for bringing down to the 

 commutator. 



Fig. 355 illustrates an armature in a nearly finished condition. 

 The lower range of coil ends are all sweated in to the commutator 



Fio. 357. Wave-wound Armature with Four Coils in place (Bruce Peebles). 



lugs, and nearly all the upper ends are also sweated in, as will 

 be clearly seen. 



After the coils are all assembled and connected up, they are 

 trued up by rotating the armature in a lathe and holding a piece 

 of chalk against the windings, which marks any coils projecting 

 more than the others. These may be hammered into place with a 

 fibre mallet, or a wood mallet and fibre wedge. 



Fig. 356 gives a general view of a continuous-current winding 

 shop, showing the assembling of form- wound coils. 



STRIP-WOUND WAVE WINDINGS. 



We now give a few photos illustrating the stages in assembling 

 wave-wound coils on the armature. 



