US Patent: 61,097
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| Improved Wrench
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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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| Applied: |
May 20, 1865 |
| Granted: |
Jan. 08, 1867 |
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Patent Pictures:
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Thomas Pratt Pat. Jan. 8, 1867 |
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Stan Schulz
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Description: |
| The wrench is comprised of two iron pieces and a spring. The spring is supposed to exert sufficient pressure on the slide to hold the adjustment. Pratt received a patent for an improvement on this design on Feb. 11, 1868 (Pat. no. 74245), and John N. Arvin's Feb. 16, 1869 patent (no. 86967) also cites this patent. |
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