Hi not to sure if this helps but this is taken from Durham Mining Museum site :
Banksmen - 1825: those who, at the bank or top of the pit, unhook and empty the laden corves into the carts or waggons, from a frame or stage.
1849: a man who draws the full tubs from the cages at the surface, when wound up by the engine, and replaces them with empty ones ; he also puts the full tubs to the weighing machine, and thence to the skreens, upon which he teems the coals. It is also his duty to keep an account of the quantity of coals and stones drawn each day.
1894: Person who controls the unloading and loading of the cage at the pit top, and signals the descent of the workmen
bagpuss
