US Patent: 137,910
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| Improvement in Railroad Track Wrenches
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Patentee:
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| Pierre L. Gibbs (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 05, 1873 |
| Granted: |
Apr. 15, 1873 |
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Patent Pictures:
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Pierre L. Gibbs. Pat. April 15, 1873 |
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Stan Schulz
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Description: |
| The socket has two interior spurs to catch the corners of nuts on fish-plate bolts. This allows one socket to fit a range of nut sizes. The socket is driven by bevel gears, turned by a "T" handle tall enough to be turned by a standing man. The wrench has a folding foot plate which clamps over the top of a rail to help hold it in position on the nut. |
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