US Patent: 214,057
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| Screw-Wrench
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Patentee:
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| George Valentine Sheffield (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 31, 1878 |
| Granted: |
Apr. 08, 1879 |
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Patent Pictures:
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George V. Sheffield patent April 8, 1879 |
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Stan Schulz
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Description: |
| The patent describes a manufacturing process that involves assembling the parts, and fusing some of them with molten Babbitt metal to prevent their disassembly.
The wrench is a quick-adjust using a partial screw on the rod, and partial rack inside the corresponding handle section. |
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