US Patent: 5,595X
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| Mill for the Manufacture of Flour and Meal
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Patentee:
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| William Parkinson (exact or similar names) - Wheeling, VA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jul. 31, 1829 |
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Joel Havens
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Description: |
| Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.
For an improvement in the machinery for the Manufacture of Grain into Flour, or meal; William Parkinson, Ohio county, Virginia, July 31.
A number of patents have been obtained for grist mills with small stones; the mill above mentioned is of this kind, the stones being from eighteen to twenty-two inches in diameter, "and the upper one is to be the runner. The manner of fixing the spindle, the balance rine, and several other parts, together with the form given to them, are particularly described, but the section given in the drawing is too small to admit of their representation, and it is entirely without written references. The upper stone is to be forced down by a screw passing through a crosstree above its centre; the point of this screw is steeled, and enters into a socket which is also steeled, and which contains oil. A spring of sufficient strength is so placed as to support the runner, and prevent its grinding against the bed stone when the mill is empty; the screw is used to force it down, and regulate its feed. The grain is to be carried low down into the eye of the runner, by means of a tube, that it may not be thrown out by the velocity of its motion, which is to be equal to about 360 revolutions in a minute.
The claims are to the formation of the husk which supports the stones; the running of the upper stone when confined by pressure; the figure of the balance rine, and its connection with the spindle and driver; the pressure rod and screw, for forcing the upper stone down; the spring under the bridge-tree for sustaining it, and the tube for conducting the grain to the lower part of the eye.”
Journal of the Franklin Institute Vol. 7, Oct. 1829 pg. 269
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