WINDING OF ALTERNATING-CURRENT ARMATURES 309 



72. The method of supporting the winding block is rather different 

 from the methods described above. 



The methods in Fig. 371 and Fig. 372 are more convenient 

 for large armatures, whereas the previous methods apply to small 

 armatures and induction motor stators. The pins projecting 

 from the slots being wound can be seen in Fig. 372. 



FIG. 372. Winding Three-phase, Whole-coiled, Double-coil Winding in 

 Three Ranges (Two Ranges completed) (Bruce Peebles). 



On p. 192 and Fig. 231 there was given an example of a 2-range 

 winding with an odd number of coils, which necessitated a bent coil. 

 Such a coil may be shaped by hand ; but this is rather difficult, 

 and a block suitable for winding the coil is outlined in Fig. 373. 

 The bend is formed round a projection on the winding block. In 

 carrying out the winding, all the back range coils are wound first 

 and then the bent coil, and lastly the front range of coils. Thus 



