356 



STEEL HEAD FRAMES AND COAL TIPPLES. 



CHAP. X. 



diameter and are placed tandem with the hoisting rope, and at right angles to the axis of the 

 main tipple building. The hoisting rope is crucible steel if in. in diameter. The steel tipple 

 building and head frame are covered with No. 18 galvanized corrugated steel carried on steel 

 purlins. Detail plans of the tipple structure are given in Fig. 13 and of the head frame in Fig. 14. 

 The head frame and tipple building are fully braced and make a very rigid structure. The main 

 track floor of the tipple is level over the first five panels on the left of the structure, the remainder 

 of the floor having a pitch of 4 in. in 17 ft. The tipple floor is covered with 4 in. planking spiked 

 to 4 in. nailing strips which are carried on I-beam joists. The weight of the structural steel, 

 including the corrugated steel but not including tipple equipment, was 415,530 Ib. 



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FIG. 15. PLAN OF TIPPLE TRACKS, SPRING VALLEY No. 5 COAL TIPPLE. 



Operation of Tipple. The detail track plan is shown in Fig. 15; the operation of the Ramsey 

 transfer is shown in Fig. 16, and the arrangement of the shaking bar screens is shown in Fig. 17. 

 Two coal cars containing if tons each are hoisted on the shaft cage. The loaded cars are pushed 

 off the cage and two empty cars are pushed on the cage by means of a steam pusher, as shown in 

 Fig. 16. From the cage platform the loaded cars run by gravity on a if per cent grade to the 

 dumps, where the coal is dumped by Phillips automatic tipples or dumps. After dumping, the 

 cars pass to the right by gravity on the 10 per cent descending grade and are stopped by a 2 per 

 cent ascending grade and a short piece of track. The cars then return by gravity, and may either 

 be switched to the outside tracks or run back on the transfer tracks. The empty cars are run on 

 the platform of the Ramsey transfer and are raised by a steam cylinder a height of 4 ft. 7 in. to 

 the level of the floor of the shaft cage, and are ready to be shoved on the cage by the steam pusher. 



The coal is dumped by the Phillips tipple dumps into one of two weigh hoppers 5 ft. wide, 

 as shown in Fig. 17. After the coal is weighed it runs out of the weigh hopper on a converging 

 chute having a slope of 30 degrees with the horizontal. From the converging chute the coal 

 runs over shaking bar screens 6 ft. 6 in. wide, the bars being placed | in. apart. The fine coal 

 passing through this screen runs over a f in. shaking bar screen and is chuted into the cars. The 

 slack passing through the f in. bar screen is run directly into the cars. From the | in. shaking 

 bar screen the lump coal passes through a converging chute and over a bar screen 5 ft. 6 in. wide 

 with the bars spaced 5 in. apart, from which the lump coal is run into cars. It will be noted that 

 five grades of coal are obtained: mine run coal; lump coal passing over the 5 in. screen; coal passing 

 the 5 in. screen and retained on a f in. screen; nut coal passing a f in. screen and retained on a f in. 

 screen, and slack. 



The capacity of the coal tipple is from 1,800 to 2,000 tons per day. The tipple was designed 

 by Mr. W. Morava, Consulting Engineer, Chicago, 111., and was built by the American Bridge 

 Company in 1900. 



Steel Coal Tipple for the Phillips Mine. The steel coal tipple at the Phillips mine of the 

 H. C. Frick Coke Company is an excellent example of a modern coal tipple for handling bituminous 

 coal. Detail plans of the coal tipple are shown in Fig. 18. The steel head frame is of the 4-post 



