294 



ARMATURE CONSTRUCTION 



strip-wound coils, and the photos which we now give will be 

 sufficient to illustrate this without much description. Fig. 350 

 shows the armature core with all the coils put on. The six coils 

 at the top of the armature not right home are the first coils put 

 on, and the upper sides of these are left up out of the slots until 

 all the other coils are in place, as the bottom parts of these six 

 slots have to be occupied by the lower sides of the last six coils to 

 be assembled. When all the coils are assembled, the first coils can 



Fm. 353. Inserting Slot Wedges (British Electric Plant Co.). 



be put right home. One will note the pieces of linen placed 

 between the ends of the adjacent coils, also the insulation between 

 the upper and lower layers 



Fig. 351 shows a similar armature; but here the commutator is 

 in place, and the lower ends of the coils are in place in the 

 commutator lugs. 



In Fig. 352 a larger armature is shown, with all the coils in 

 place ready for receiving the commutator and for connecting up. 



Fig. 353 is the armature of a 4-pole machine with all coils in 

 place and the commutator ready for sweating the coil ends into 



