WINDING OF ALTERNATING-CURRENT ARMATURES 305 



turned in this way until the whole of the six coils in the back 

 range have been wound, after which they may be taped up and 

 varnished, giving the appearance shown in Fig. 368. One range 

 of coils is now completed and the block is set up for the first coil 

 of the second range. 



The second range may be bent up after leaving the slots in a 

 plane parallel to the first range, as in Fig. 230, d, or the ends of 

 the coils may project out cylindrically as in Fig. 230, c, Chap. IX. 



FIG. 366. Slots 3 and 10, 2 and 11 Wound. 



I 



FIG. 367. Slots 3 and 10, 2 and 11, 1 and 2 Wound. 



Taking first the case where the coils are bent up parallel, and the 

 block is rigged up in the manner of Fig. 369, the front range of 

 coils is wound and finished in exactly the same way as the 

 previous range. The phases are next connected up according to 

 the diagram in Fig. 247. 



The connections between the coils of each phase may be made 

 to lie against the core end flange, above the ends of. the coils. If 

 the winding is a 3-range winding, the winding blocks are packed 

 out 'still further for the third range, which is then laid up in front 

 of the other two ranges and wound in precisely the same way. 



20 



