WINDING OF ALTERNATING-CURRENT ARMATURES 313 



To facilitate insertion each tooth stamping may be slightly bent 

 along its axis and 

 flattened when pressed 

 into position. The 

 coils may thus be form- 

 wound and assembled 

 on the armature be- 

 fore the detachable 

 teeth are inserted. 



Fig. 385 and 386 

 give general views of 

 the alternating-current 

 winding shop of Messrs 

 Lahmeyer's works. 



All the stationary 

 armatures visible in 

 this illustration are 

 being hand wound, 

 and shaped by hand 

 with the aid of mallets 

 and winding wedges. 

 It will be noted that 

 the coils in process of 

 winding are in each 

 case at the bottom 

 part of the armature. 

 This is the most con- 

 venient position for 

 hand winding without 

 a block ; but when the 

 coils are wound over a 

 block, it is most con- 

 venient to wind them 

 at the top of the arma- 

 ture, as in Fig. 372 



Fig. 385 also shows 

 the common types of 

 reels in use for hold- 

 ing the coils of wire 

 during winding. 



Strip-wound Coils. When the conductor consists of a braided 

 strip the coils may be wound by hand, either over a winding-block, 



