NORTH. IU7LLI COLLIKRV. 



177 



opposite directions, rotating or twisting is prevented. The 

 rope has a comparatively large wearing surface, the flattened 

 shape of the strands bringing the greatest number of wires in 

 each strand in contact with the grooves of the sheaves, thus 

 greatly increasing the life of the rope. 



Each range of coke ovens has a conveyor of its own, 

 worked by electricity. The supports are above the ovens, and 

 being subject to heat the whole apparatus is constructed of 

 iron or steel. Each oven has two feed holes, and there is a 

 valve in the bottom of the trough over each oven. When 

 desired to fill an oven, the valve is opened and a duff-box with 



Eig. 110. Hydraulic Rani for Working Doors of Ovens. 



two spouts one for each feed hole which runs on rails is 

 placed beneath. The spouts are arranged on a turntable, so 

 that they can be moved out of the wav of the oven chimneys 

 when the canister is pushed from one place to another. When 

 desired to fill the further range of ovens, all the valves in the 

 trough above the first range are closed, in order that the duff 

 can be dragged to the end, where it falls into a bin, having 

 a capacity of 20 or 30 tons. So that an oven shall not be over- 

 charged, a smaller hopper, which has the capacity of an oven 

 charge, is filled, and its contents then run into the conveyor 

 trough. 

 L 



