US Patent: 473,617
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| Socket Wrench
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Patentee:
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| Benjamin Hopkins Dunlap (exact or similar names) - St. Louis, MO |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 07, 1891 |
| Granted: |
Apr. 26, 1892 |
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Patent Pictures:
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Benjamin Hopkins Dunlap patent April 26, 1892 |
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Stan Schulz
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Description: |
| Combination screw- and cam-wheel adjusting axle nut wrench. The screw adjusting jaw sets the general size; the cam-wheel adjusting jaw clamps the wrench to the axle nut. |
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