102 



A, which is built up of segmental plates 

 to form a cylinder. The following par- 

 ticulars refer to a 100-kilowatt machine, 

 giving 50 amperes at 2,000 volts terminal 

 pressure, the speed being 380 revolutions 

 per minute. The internal diameter of the 

 armature core is 5 feet 1 inch ; the radi- 

 al depth 5 inches, and the length 14 



Fig. 23 



inches. There are twenty-eight coils, 

 each containing 21 turns, so that the 

 total number of active wires, counted all 

 round, is eleven hundred and seventy-six. 

 The field-magnet cores are of wrought- 

 iron, 3 inches by 13£ inches, and are 

 bolted to a wrought-iron yoke-ring y. 

 Each magnet-coil contains 130 turns of 



