Model of a Furnace for a Steam Engine, Rijkswerf Rotterdam, c. 1840 Canvas Print
Model of a device for mechanical firing of a boiler; a bucket with movable bottom, operated by a handle with ratchet on a gear, is filled with coal through a small door; the bottom is jacked up and the coals are thus brought from below to the grid; two movable parts of the grid each time a part of the contents of the container is scooped up. Scale 1:10 (derived).
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