58 ELEMENTS OF ELECTRICAL ENGINEERING. 



44, which is called the pole shoe. This pole shoe is put in place 

 and fixed by bolts, after the field coils have been slipped into 

 position on the projecting field cores. 



Fig. 45 is a general view of a ten-pole direct-current generator 

 of the Bullock Electric Manufacturing Company, connected di- 

 rectly to the main shaft of the driving engine. The figure shows 

 the rocker-frame, which supports the ten sets of brushes, and 

 the mechanism for adjusting the brushes by turning the rocker- 

 frame by means of the small hand wheel on the right. Fig. 46 



GSB 



Fig. 46. 



shows the armature core and commutator of the generator which 

 is shown in Fig. 45. The manner in which the sheet-iron arma- 

 ture core stampings are supported on what is called a spider, is 

 shown in Fig. 47. The partly wound armature is shown in Fig. 

 48, and two of the armature coils are shown in Fig. 49. The 

 space between the armature core and the flange at one end of 



