ARMATURE WINDINGS. 



437 



Fig. 56 shows a six pole drum simplex lap winding with 60 

 inductors, having a back pitch of -f- 9, a front pitch of II, 

 and a commutator pitch of I. This winding presents six 



Six-pole drum simplex lap winding. Z=6o, front pitch = II, back pitch 

 = -f- 9, commutator pitch = I, number of paths = 6. 



Fig. 56. 



paths in parallel between the brushes with one sixth of the 

 inductors in series in each path, and it must have six brush sets 

 as shown in Fig. 56. This winding is singly reentrant. 



