There is an article 'A Gin Wheel in S.E. Northumberland' in Bulletin 14 of
The North East Industrial Archaeology Society (1971) which includes drawings
of a 'four horse-driven threshing plant' which might be of help.
For mining gins there are descriptions and sketches of a cog and rung gin
and a whim gin in :
'The Archaeology of the Coal Trade' by T. J. Taylor and
'The Great Northern Coalfield, 1700 - 1900' by Frank Atkinson.
Alan.
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