PHASE METERS 



541 



movable element can rotate continuously. The essential elec- 

 trical connections are indicated in Fig. 324. 



To Incoming Machine To Bus-bars 

 FIG. 324. Diagram for Lincoln synchroscope. 



FIG. 325. General Electric Co. synchroscope. 



In the actual instrument, Fig. 325, the shaft carrying the slip 

 rings and the movable element is mounted in ball bearings and 



