318 



COALFIELDS AND COLLIERIES OF AUSTRALIA. 



hoist is a duplex direct acting steam engine, with poppet 

 valves, made by Grant, Kitchie and Co., of Kilmarnock, in 

 1889. The drums are cylindro-conical, with the brake path 

 between; only the conical portion of the drums is used. The 

 driver stands on an elevated platform to work the engine. 

 There are five Cornish boilers. 



The engine used for driving the electric generator is a 

 McEwans type, manufactured by the Jeffrey Manufacturing 

 Company, "it has a 16in. cylinder and 16in. stroke, and is 

 provided with a patent fly-wheel governor. It is connected 



I 



Fig. 203. Trough and Scraper. 



with the electric generator by means of leather belting. The 

 generator is 100k. w. continuous current, run at 500 r.p.m. It 

 has 275 volts, and 365 amp., with full load. It can slide on its 

 bed plate, so as to adjust the distance to suit the length of 

 the belt. 



The Jeffrey conveyor at the Burwood Extended being in- 

 tended to fill unscreened coal into a 1200 T. wooden hopper, 

 which is emptied through horizontal sliding gates into wag- 

 gons below, consists of a series of scrapers, not buckets, which 



.Fig. 204. "Alabama" Type. 



pass along a steel trough (Fig. 203), and drags the coal, large 

 and small, along with them, as far as the valve which is opened 

 over the spot where it is desired to deposit it. The scrapers 

 are attached at either end to a steel roller chain of the "Ala- 

 bama" type. (Fig. 204.) The steel trough, which is sup- 

 ported on a wooden structure, is placed below the lower part 

 of the roller chain, the scrapers or "flights" returning over- 

 head. The valves in the trough are about lift, apart, and are 

 worked by a rachet and pinion. 



