50 



ARMATURE CONSTRUCTION 



FIG. 44. Circular Shear with Segment Attachment. Zeh & Hahnemnnn. 



The full sheet of metal first passes a double-crank power press 

 (Fig. 45), which punches the holes that later form the dovetail 



notches, and also cuts the 

 long radial slits for the 

 ends of the segments, as 

 indicated in Fig. 46. The 

 dies for these notches, 

 as well as the slitting 

 knives, are adjustable 

 within wide limits, and 

 can readily be set by 

 means of a suitable tem- 

 plate. Plain gauges are 

 provided to space pro- 

 perly the succeeding 

 cuts. 



The sheet thus pre- 



pared, next passes through 



the circular shear with 

 segment attachment, 

 already shown in Fig. 



FIG. 45.-Double Crank Press. Zeh & Hahnemann. ^ Thig ^ the geg _ 



ments apart and finishes the periphery, as shown in Fig. 47. 



