TL5875 : Northfield windmill - Soham

taken 3 years ago, near to Soham, Cambridgeshire, Great Britain

Northfield windmill - Soham
Northfield windmill - Soham
This is a view from the stairs to the first floor where the mill stones are. The stones are underdrift from the great spur wheel on the right. A stone nut is seen in the centre and there are two tentering governors for the two sets of stones. It's a small and compact mill.
Northfield or Shade Windmill
Formerly an eighteenth century drainage smock mill it was moved to the current site around 1834, elevated on a hexagonal brick base and converted to grind corn.
Tentering - molinological application
In a mill context, tentering is changing the distance (gap) between the runner stone and the bed stone. Decreasing the distance results in a finer grain. As the stones go faster there is a natural tendency for the runner to rise and the tentering mechanism can be adjusted to counter this. In many windmills this is done by a governor that automatically compensates for the tendency of the runner to rise. In watermills it is done by hand with mechanisms of varying elegance. In this case, the second order lever at the bottom raises or lowers the footstep bearing that the spindle carrying the stone nut is supported by. The adjustment is by a vertical lead screw on the other side of the frame and in easy reach of the miller.
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TL5875, 23 images   (more nearby )
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Date Taken
Saturday, 14 May, 2016   (more nearby)
Friday, 23 February, 2018
Geographical Context
Historic sites and artefacts 
Place (from Tags)
County (from Tags)
Primary Subject of Photo
Subject Location
OSGB36: geotagged! TL 5871 7509 [10m precision]
WGS84: 52:21.0545N 0:19.7272E
Camera Location
OSGB36: geotagged! TL 5871 7509
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Milling Machinery 

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Image Type (about): inside 
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