US Patent: 562,117
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| Wrench
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Patentee:
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| Alvor Butterfield (exact or similar names) - Indianapolis, IN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 30, 1896 |
| Granted: |
Jun. 16, 1896 |
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Patent Pictures:
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Alvor Butterfield patent June 16, 1896 |
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Stan Schulz
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Description: |
| Double-ended ratchet with provision for insertable bushings to adjust the size of the wrench openings. The central adjuster with left- and right-hand threads adjusts the tension on the pawls so the ratchet will "release" when working a loose nut. |
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