142 ARMATURE CONSTRUCTION 



age, etc. But it will make up in current capacity that which it 

 loses in pressure. Thus, suppose that two 6-pole armatures have 

 the same number and size of conductors, and that the magnetic 

 flux and the speed are the same in both cases: suppose the 

 multiple-circuit winding, for a given heating, gives 600 amperes 

 at 200 volts, then the two-circuit winding will give 200 amperes 

 at 600 volts. 



In everything that has been said, a two-circuit simplex winding 

 lias been assumed. There is, however, another large class of 



FIG. 168. Completed Lap Wovmd (Multiple-circuit) Armature. 



two-circuit windings, which may be designated two-circuit multi- 

 plex windings. Thus we may have two-circuit duplex, two- 

 circuit triplex windings, etc.; but these are not often employed, 

 and unless expressly stated to the contrary, it may be understood 

 that a two-circuit simplex winding is meant. 



Multiple-circuit windings are sometimes called " lap " windings, 

 and two-circuit windings are sometimes called " wave " windings. 

 These two names have been suggested by the characteristics 

 illustrated in Fig. 166. "Wave" windings (i.e. " two-circuit " 

 windings), are often employed in machines of small capacity, 



