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the closed storage bin and is equipped with a tripper which <br /> automatically traverses back and forth distributing the coal <br /> uniformly in the bin. The conveyor spans the entire length <br /> of the bin. The tripper can be set by the use of limit <br /> switches to unload the coal over the whole bin or any selected <br /> portion of it . <br /> The loadout storage bin in horizontal cross-section is <br /> 600 feet long by 80 feet wide . It holds 28 , 000 tons of coal <br /> when full . The sides , or hopper portion of the bin are <br /> shaped in the form of a trough set at a 45 degree angle . At <br /> the bottom of the trough is a loadout tunnel in which is <br /> installed a convevor belt . Coal is fed from the bin onto <br /> the conveyor belt by a rotary plow feeder which plows the <br /> coal from shelves mounted on the sides of the tunnel . This <br /> setup is the key to the successful operation of the bin . <br /> Limit switches are installed to allow the plow to unload the <br /> whole bin at once or various parts of it . The traverse <br /> speed of the plow is variable and it is designed to uni- <br /> formly load the belt . The speed of the two rotor blades on <br /> the plow is variable and can be adjusted to control the <br /> amount of coal placed on the belt . The rotors revolve in <br /> opposite directions . <br /> The belt in the loadout tunnel transfers its load at a <br /> right angle onto another conveyor belt that discharges into <br /> a surge hopper located over the railroad tracks . The surge <br /> hopper is equipped with a hydraulic gate which can be moved <br /> 3 <br />