US Patent: 74,245
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| Improvement in Wrenches
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Patentee:
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| Thomas Pratt (exact or similar names) - Valparaiso, IN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Feb. 11, 1868 |
| Antedated: |
Feb. 05, 1868 |
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Patent Pictures:
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Thomas Pratt Pat. Feb. 11, 1868 |
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Stan Schulz
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Description: |
| The patent is an improvement on Pratt's Jan. 8, 1867 patent (no. 61097). This patent uses a spring-tensioned eccentric cam lever to hold the adjustment of the sliding jaw. |
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