198 



ELEMENTS OF ELECTRICAL ENGINEERING. 



tion board (the figure shows the two primary coils connected in 

 parallel with each other), and the four terminals of the two 

 secondary coils pass out of the case as shown in the lower por- 

 tion of Fig. 163. 



The core-type transformer. A transformer in which the coils 

 of wire surround a more or less elongated core of laminated iron 



Fig. 167. 



Fig. 168. 



is called a core-type transformer. Figure 162 shows a core-type 

 transformer of the Westinghouse Electric Company, and Fig. 

 164 shows the laminated iron core of this transformer. In this 

 transformer half of the primary coil and half of the secondary 

 coil are wound on each leg a and b, Fig. 164, of the core, the 



