Figure 1. — Horizontal traveling screen, model I. 



REDUCTION GEAR 



D.C. MOTOR 



POCKET SHEAVE 



@) 



SECTION OF DRIVE CHAIN 

 WITH HANGERS 



Figure 2. --Variable-speed d.c. motor and reduction gear drive assembly on traveling screen. 



top edge at intervals corresponding to the 

 hangers on the chain (fig. 4). Every fourth 

 bracket extended to the bottom of the screen 

 to serve as a stiffener. The brackets were 

 attached to the drive chain with size 14, 

 brass single -jack chain loops. 



Additional support was provided by two 

 stationary, horizontal rub-rails on the down- 



stream side of the screen (fig. 4). The rub- 

 rails, constructed of 25 -mm. wide strap-iron, 

 prevented the screen from being swept out of 

 position by the flow. The rub -rail mounted on 

 the floor also prevented fish from passing 

 under the screen. The ends of the rub-rails 

 were curved to eliminate the possibility of the 

 screen becoming caught. 



