US Patent: 664,319
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| Oil-stone
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Patentee:
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| Milton B. Hill (exact or similar names) - Worcester, MA |
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Patent Dates:
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| Applied: |
Feb. 05, 1900 |
| Granted: |
Dec. 18, 1900 |
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Jeff Joslin
Vintage Machinery entry for Norton Co.
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Description: |
| An vitrified-bond artificial sharpening stone has a porous structure that can absorb quite a bit of oil. The innovation here is to saturate the stone with a semisolid material such as wax or petrolatum (Vaseline), which prevents the stone from soaking up oil and also provides some lubrication if the stone is used dry. |
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