US Patent: 57,282
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| Improvement in Wooden Screws
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Patentee:
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| Thomas Bowers (exact or similar names) - Zanesville, OH |
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Patent Dates:
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| Granted: |
Aug. 21, 1866 |
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Patent Pictures:
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Russ Allen
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Description: |
| Vise screw found with its head marked, Ohio Tool Co, Bowers Pat. Pat Aug 1866.
The innovation is a screw-thread profile of a buttress style that is claimed to have higher strength than previous profiles. This profile was particularly intended for bench-screws in wood, where the grain of the wood is weaker in shear force along the direction of the grain. |
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