306 COALFIELDS AND COLLIERIES OF AUSTRALIA. 



It is all pick work in this mine; no machines are used. 



There are two endless ropes ; one running north for two 

 miles, the other south; they travel at the rate of two miles per 

 hour. The southern rope serves two districts. Later on they 

 will have a band rope down the shaft, and work each district 

 by its separate rope. 



The colliery is unwatered by a Tangye pump, also by a 

 rope driven pump, which delivers water to the old Burwood 

 shaft. 



The Walker's fan is 24ft. in diameter and Tft. wide. It 

 is run with cotton ropes, and geared 2 to 1. Cotton is found 

 to be more durable though more expensive in first cost than 

 manila rope. The engine that drives the fan is compound, so 

 arranged that one-half of it can work the fan if necessary. It 

 is driven with lOOlbs. steam pressure, and makes 40 revolu- 

 tions per minute. 



The shafts are both 15ft. in diameter, and 600ft. deep; 

 they are lined with brick when in soft ground. A compensa- 

 ting balance is used between the safety detaching hook and 



Fig. 196. Connection for Bridle Chain. 



the bridle chains which consists of a plate capable of moving 

 on a central pin (Fig. 196), so that it can equalise the strain 

 on the chains attached to it. The cages run on rope guides, 

 which are clamped at the top with three clamps. On account 

 of corrosion at the bottom of the pit, the ropes became too 

 short, so were lengthened from the top by means of rods. 



The winding engine has a 10ft. drum, 24in. diameter cy- 

 linder, and 4ft. stroke. 



The full skips at the surface ;\re run into Tate's water 

 balanced tipplers (Fig. 19T). The skips are prevented from 

 running out at the far end of the tippler by long hooks which 

 catch in the front axles, and when tipped over sideways, the 

 skips are prevented from falling out by angle irons that keep 

 the wheels on the rails. The water-tank underneath the rails 

 is so weighted that it more than counterbalances the top part 



