132 



ARMATURE CONSTRUCTION 



are only 192 conductors." This, of course, is true; but as there is 

 neither end nor beginning to a circle, so also, in the case of a 

 multiple-circuit armature winding, which is arranged on the 

 periphery of a circle, we may take conductor No. 194 as having 

 its equivalent in conductor No. (194192), i.e. in conductor No. 2. 

 Thus, finally, we have found out that which we wanted to know a 

 few paragraphs back. i.e. the number of the conductor to which 

 conductor No. 2 is connected. The quantity, 49, which we add in 



FIG. 157. Element of Armature Winding Dingram. 



each case in the process of connecting up, is called the " winding 

 pitch," or, briefly, the " pitch," and is denoted by y. We call the 

 two ends of the armature the " front " (or commutator) end, and 

 the " back " end. The quantity, 49, is the " back-end pitch," i.e. it 

 is the number to be added to any conductor in order to find out 

 the conductor to which, at the back end, it is connected. For the 

 present it should merely be noted that, at the " front " end, both 

 ends of any turn are carried to commutator segments. 



It is very convenient to diagrammatically represent windings 

 as shown in Fig. 156. For the time being, however, the only 

 conductors shown and numbered are the ten conductors 1, 2, 49, 



