US Patent: 78,861
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Wrench
Improvement on the Jaws of an Ordinary Wrench
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Patentee:
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| Daniel W. Colburn (exact or similar names) - Loami, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jun. 16, 1868 |
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Patent Pictures:
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Daniel W. Colburn Pat. June 16 1868 |
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Stan Schulz
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Description: |
| The jaw faces are of different lengths and the longer jaw face is slightly concave. This construction allows for a ratchet-type movement. |
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