OAKEY PARK C.'OLLIEUY. 121 



one mile per hour, so as not to crowd the main flat or 

 junction, and they only take two skips in a set. 

 The No. 1 or eastern district rope has a circulating length of 

 1300 yards, while the No. 3 or western district has a total 



Elevation. 



U 



Plan. 



Yig. 60. Rope at Bottom of Shaft. 



length of 2700 yards. Screw dog-clips are used to fasten a set 

 to the rope, while coupling chains, made of three long links, 

 connect the different skips. Fig. 59 shows how the main rope 

 circulates at the surface between the engine and top of the 

 shaft, while Fig. 60 shows how the rope is guided in the direc- 

 tion required at the bottom of the shaft. The small idler (a ) 

 is made out of two old skip wheels bolted together, as shown. 



Plan. 

 Fig. 61. Automatic Signalling. 



Where the curve occurs on the main haulage-way, centre 

 sheaves, or "Tommy Dodds," are used to keep the rope in the 

 middle of the track ; these sheaves are placed vertically, and 

 rotate on a bolt fastened to a sleeper. A long-handled hook is 



