8 



ELEMENTS OF ELECTRICAL ENGINEERING. 



projections 5555 as shown by the dotted lines in Fig. 13. 

 The laminated structures AA and AA are slotted on their 

 inner faces to receive the armature wires across which the lines 

 of force sweep when the inductor is rotated. 



Single-phase and polyphase alternators. The details shown in 



Fig. 10. 



Figs. I, 2, 3 and 4 refer to what is called a single-phase alterna- 

 tor. A polyphase alternator is an alternator upon the armature 

 of which two or more entirely distinct windings are placed, each 



