US Patent: 42,738
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| Grindstone-dresser
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Patentees:
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| Lewis Semple (exact or similar names) - Philadelphia, PA |
| Robert Barkley (exact or similar names) - Philadelphia, PA |
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Patent Dates:
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| Granted: |
May 17, 1864 |
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Jeff Joslin
Vintage Machinery entry for George C. Howard
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Description: |
| This patent notes a predecessor in Schuyler's grindstone dresser of patent 28,639 but says that Schuyler's dresser-wheel construction was "difficult and expensive, and also very liable to fracture in use". The dresser-wheel of Barkley and Semple is cast in a chilled mold and is claimed to be rugged enough to not require the yielding washers of Schuyler's invention. |
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