io8 



FARM MACHINERY 



seed box. A feed shell is provided which is attached to 

 a revolving shaft receiving its motion from the main axle. 



Fig. 78 shows the most com- 

 mon force-feed device. In 

 the fluted cylinder, the de- 

 vice illustrated, the feed is 

 regulated by exposing more 

 or less of the cylinder to the 

 grain. The feed shell is also 

 designed in other ways. The 

 seed cells may be on the inside and without any means 

 of regulating the size of the cell. The feed or the amount 

 of seed is regulated by varying the speed of the shaft 

 carrying the feed shells by gearing as shown in Fig. 80. 



FIG. 79 ANOTHER TYPE OF FORCE 

 FEED 



FIG. 80 A FEED-REGULATING DEVICE USED IN CONNECTION WITH A FORCE 

 FEED SIMILAR TO THAT SHOWN IN FIG. 7p 



