US Patent: 179,456
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Wrench
Improvements in Monkey-Wrenches
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Patentee:
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| Luther M. Johnson (exact or similar names) - La Grange, OH |
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Patent Dates:
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| Applied: |
May 18, 1876 |
| Granted: |
Jul. 04, 1876 |
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Patent Pictures:
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1 | 2
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Luther M. Johnson Pat. July 4, 1876 |
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Stan Schulz
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Description: |
| The extended shank on the movable jaw has a row of rack teeth. The shank has a single tooth enclosed within a housing that also has a cam lever. The cam lever locks the selected adjustment.
A known example of the wrench has no visible markings. |
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