Brewery shaft at Nenthead?
...Brewery Shaft. It certainly matches how the system has been described to me, by people who seemed to know what they were talking about.
... France and parts of northern Italy relates to the process of generating the air blast for furnaces by whatever means...
For a full description of the compressed air system at Brewery Shaft see:Paul Thorne, 'The Use of Water Power for Compressed Air Generation, at Brewery Shaft, Nenthead' in Water Power in Mining (Proceedings of the 2002 NAMHO Conference ed. Peter Claughton), PDMHS 2004, pp. 27-32Dave
Some of the mines in the Greenhow area used what they called a water blast to move air to the forehead. Sounds like the same principle, water coming down a shaft, then using a separator to split the air from the water. The difference being that the compressed air was sent along the levels, rather than being used to power tools.I don't know if they were used up to the point when compressed air tools became the norm for mining.
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