US Patent: 37,865
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| Improvement in Wrenches
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Patentee:
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| George W. Griswold (exact or similar names) - Logansport, IN |
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Patent Dates:
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| Granted: |
Mar. 10, 1863 |
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Patent Pictures:
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George W. Griswold patent March 10, 1863 |
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Stan Schulz
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Description: |
| Each opening of a flat wrench with multiple "notches" fits two sizes. Wrenches conforming to and citing this patent were marketed in the later 1860s.
Ken Cope's "American Wrench Makers 1830-1930" cites a hardware catalog listing crediting production to the Russell and Erwin Mfg. Co., New Britain, CT.
Many malleable iron "implement wrenches" were made with double-size openings like those described in this patent. |
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