CONTINUOUS-CURRENT WINDINGS 



135 



consisting in connecting the commutator segments to the winding 

 by means of short radial lines which have their equivalent in 

 practice in the leads from the winding to the commutator, 

 although, of course, some armatures are actually constructed in 

 accordance with the method indicated in Fig. 160 i.e. the ends of 

 the turns are carried directly to the segments. More often, how- 

 ever, the method actually adopted corresponds with the diagram of 

 Fig. 162, in which it is indicated that additional strips are intro- 

 duced, connecting from the winding to the commutator. 



\un/ 



FIG. 161. Elements of | Armature Winding Diagram 



In Fig. 162 we have now drawn the complete winding diagram 

 for the armature, which would be arrived at by simply continuing 

 Fig. .161. To clearly indicate the front and back winding pitches, 

 the turn comprising conductors 1 and 50 has been thickened in. 



We see that the " front end pitch " is equal to 



50-3 = 47, 



i.e. at the front end, conductor No. 50 is connected to conductor 

 No. 3. As the connection at the front end is carried out in the 

 opposite direction, i.e. counter-clockwise, we may say that the 

 front end pitch is in this case negative, i.e. it is equal to 47. 

 It is customary to denote the winding pitch by y, and to 



