. Railroad structures and estimates . Fig. 225. Four-pocket Plant, Single Track, Wood Structure. — Fig. 226illustrates a four-pocket, single-track McHenry coaling plantwith weighing device to each pocket. Capacity 140 tons. Costcomplete S8000 to SQoOO. In the two and four pocket plants the coal car is spotted overthe hopper and dumped, the coal running by gravity into theboot, where it is hoisted by endless chain and bucket method tothe pockets above. On the upper horizontal run the coal isscraped along the conveyor. Gates are provided to each pocket MECHANICAL PLANTS. 479 so that the coal may
. Railroad structures and estimates . Fig. 225. Four-pocket Plant, Single Track, Wood Structure. — Fig. 226illustrates a four-pocket, single-track McHenry coaling plantwith weighing device to each pocket. Capacity 140 tons. Costcomplete S8000 to SQoOO. In the two and four pocket plants the coal car is spotted overthe hopper and dumped, the coal running by gravity into theboot, where it is hoisted by endless chain and bucket method tothe pockets above. On the upper horizontal run the coal isscraped along the conveyor. Gates are provided to each pocket MECHANICAL PLANTS. 479 so that the coal may be dumped into any one desired by leavingthe gate open. In the four-pocket plant the chains and bucketsmake an entire circuit round the house, the drive being set abovethe up-shaft end. The engine house with steam or gasoline. Engine Track Fig. 226. power is placed a little beyond the coal structure, and a ropedrive connects the engine with the main drive above. If de-sired, the mechanism can be motor driven direct or by pulley,thus dispensing with the engine house, when electric power canbe obtained. The chain speed is 65 ft. per minute and the powerconsumption about 12 to 15 horsepower. The space under thepockets may be boarded and used for storage purposes. Four-Pocket, Three-track Plant, Wood Structure. — Fig. 227illustrates a four-pocket, 150-ton elevated capacity, three-trackcoaling plant. Cost complete $12,000 to $16,000 with dynamom-eter weighing device to each pocket, so that the amount of coaltaken by each tender is recorded. Under the elevated pocketsnext to the coal hopper the space is boarded and used for storagepurposes if desired, gates being provided so that the coal canflow back into the hopper and be re-elevated when necessary. 480 MECHANICAL PLANTS.
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