US Patent: 166,587
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| Improvements in Screw-Wrenches
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Patentee:
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| Matthew E. Campfield (exact or similar names) - Girard, PA |
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Patent Dates:
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| Applied: |
Apr. 13, 1875 |
| Granted: |
Aug. 10, 1875 |
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Patent Pictures:
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Matthew E. Campfield Pat. August 10, 1875 |
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Stan Schulz
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Description: |
| The major feature of this Campfield patent is the ferule locking screw within the handle.
Ken Cope's "American Wrench Makers 1830-1930" notes this patent and Rush Battle's July 20, 1875 patent (no. 165,655) were the basis for the Girard Wrench Mfg. Co. wood handle monkey wrenches. |
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