US Patent: 5,423X
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| Mill Stone
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Patentee:
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| David Philips (exact or similar names) - Jefferson County, MS |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Apr. 03, 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.
"The principle of this improvement consists of the form and arrangement of the lands and the furrows of the stones; the arrangement consisting of the greatest possible number of furrows, directed from the periphery of the stone towards the eye. The general surface of the stones is perfectly plane, having no dish or bosom, as in the common stone. The furrows consist of two sets; those which, with their branches, lead from the eye to the periphery, and those which rise in the intervening lands, and run to the periphery: the former diminish in their width and depth, as they proceed outwards; the latter increase in their width and depth, as they proceed outwards. The form of the furrows, as to their depth, may be nearly a half circle. The lands between the furrows, as they approach the eye of the stone, should contain no more surface than is necessary to give them sufficient strength, and should increase in surface as they pass outward. The upper and lower stones are similar. The claim is to the arrangement of the furrows.”
Journal of the Franklin Institute Vol. 4, Jul. 1829 pg. 50
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