Jigging screens, Beamish Museum, Co.Durham
The winding engine was the source of power for hauling miners, equipment and coal up and down the shaft in a cage, the top of the shaft being in the adjacent heapstead, which encloses the frame holding the wheel around which the hoist cable travels. Inside the Heapstead, tubs of coal from the shaft were weighed on a weighbridge, then tipped onto jigging screens, which sifted the solid lumps from small particles and dust – these were then sent along the picking belt, where pickers, often women, elderly or disabled people or young boys (i.e. workers incapable of mining), would separate out unwanted stone, wood and rubbish. Finally, the coal was tipped onto waiting railway wagons below, while the unwanted waste sent to the adjacent heap by an external conveyor.
