Threshing machine

Model of a water-driven threshing machine, by Jonas Norberg. Described in the inventory of 1779 as "Model of a threshing machine with stamps, to be driven by waterfall, made by the undersigned, with severall improvements. In particular the same is so arranged, that even though the waterwheel lies deep in the stream, the threshing machine will still stand on even ground, and its gear roller which lift the stamps, will be pulled around by a certain invention, a (45 degrees or slightly less) over the water horizon leaning thin log, which reaches down to the water wheels. As soon as the grain is loosened from the chaff, they flow down into a, beneith the straw layer located, locked wooden chest, in order that no unthreshed grain, may by unfaithful people be stolen. The bars, on which the stamps are suspended, each independable, may by means of wedges be clamped higher or lower, as needed, so that the stamps after their stroke shall not prevent the advancing cereal, and so that the bars shall press the stamps just right."