US Patent: 608,767
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| Wrench
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Patentees:
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| Lott Frederick (exact or similar names) - North Summit, PA |
| George Hugh Dugan (exact or similar names) - North Summit, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 30, 1897 |
| Granted: |
Aug. 09, 1898 |
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Patent Pictures:
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Lott Frederick and George Hugh Dugan patent August 9, 1898 |
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Stan Schulz
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Description: |
| Interrupted threads inside the adjusting barrel engage with threads on two edges of the shank to hold the adjustment. A motion limit stop marks he position when the threads are engaged. The movable jaw and a closing collar slide on the shank and keep foreign matter from entering the interior of the adjusting barrel. |
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