﻿COHEN. 
  

  

  Fig. 
  1. 
  

  

  N. 
  T. 
  Co. 
  Alternator. 
  

  

  Fig. 
  2. 
  

  

  Unfiltered 
  Wave. 
  

  

  Fig. 
  3. 
  

  

  Filtered 
  Waye. 
  

  

  