US Patent: 61,537
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| Metal Nut
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Patentees:
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| William Harris (exact or similar names) - Rush Run, OH |
| Clinton Browning (exact or similar names) - Rush Run, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jan. 29, 1867 |
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Patent Pictures:
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Harris & Browning Pat. Jan. 29, 1867 |
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Stan Schulz
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Description: |
| This patent is for a nut with an attached spring which would prevent loosening until released by a wrench with an angled groove in the throat. The wrench itself is noted as being the subject of a separate patent application, although it is prominent in the drawings for this patent. |
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