US Patent: 154,680
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| Wrenches
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Patentee:
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| Benjamin F. Joslyn (exact or similar names) - Worcester, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 02, 1874 |
| Granted: |
Sep. 01, 1874 |
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Patent Pictures:
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Benjamin F. Joslyn Pat. Sept. 1, 1874 |
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Stan Schulz
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Description: |
| The adjusting screw's threads are tapered, and the screw's engagement with the rack is held by a spring. This allows for quick adjustment as well as screw-adjustment. |
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