290 AGRICULTURAL ENGINEERING 



Cups and Drag Flights are used for conveying the grain 

 up the carrier. The cups seem to be of the most desirable 

 construction when the loaded weight is carried upon rollers. 





Fig. 182. A portable elevator equipped with an overhead dumping 

 jack, swing hopper, and conveyor for distributing the grain. 



In the first place, these carriers will be the more durable, as 

 the scraping action of the flights cannot help but produce 

 an undue amount of wear, even when guides are provided 

 to keep the flights free from the bottom of the elevator 

 trough. In the second place, the cups will handle any kind 

 of grain. 



The Derrick and the Conveyor. The derrick for holding 

 the elevator at the proper angle is an important part of the 

 machine. It should be so arranged that it may be erected 

 quickly after being folded down, and should be provided with 

 a powerful windlass. Cables are more durable than ropes, 

 especially when greased occasionally to prevent rust. 



If the elevator is to be moved often, the elevator proper, 

 the hopper and the derrick, should be mounted on a truck. 

 Some of these trucks are very cheaply constructed; yet, unless 

 the elevator is to be moved far and often, an expensive truck 

 is not needed. 



