DRIVEN MACHINES 



135 



a car. It depends upon the use to be made of the ma- 

 chinery whether the strictly stationary or portable ele- 

 vator is required. To unload usually some kind of pit 

 or incline is needed with any kind of an elevator, so the 

 load may be dumped automatically quickly from the 

 wagon box to be distributed by carrying buckets at 

 leisure. 



Figure 131. Portable Grain Elevator Filling a Corncrib. The 

 same rig is taken to the railway to load box cars. The wagon is un- 

 loaded by a lifting jack. It costs from Ic to l%c per bushel to 

 shovel corn by hand, but the greatest saving is in time. 



Some elevators are arranged to take grain slowly 

 from under the tailboard of a wagon box. The tailrod 

 is removed and the tailboard raised half an inch or an 

 inch, according to the capacity of the machinery. The 

 load pays out through the opening as the front of the 

 wagon is gradually raised, so the last grain will dis- 

 charge into the pit or elevator hopper of its own weight. 

 Technical building knowledge and skill is required to 

 properly connect the building and elevating machinery 

 so that the two will work smoothly together. There 

 are certain features about the building that must con- 



