US Patent: 117,679
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| Improvement in Wrenches
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Patent Dates:
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| Granted: |
Aug. 01, 1871 |
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Patent Pictures:
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George B. Phillips patent August 1, 1871 |
USPTO pdf tiff
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Description: |
| The features include interchangeable jaw faces, a screw adjustment with an adjustment-locking cam, and wood side-plates dovetailed into the handle.
The WALTON screw wrench apparently used incidental details of this patent; the shape of the adjusting worm and rack teeth on the shank, along with jaws not perpendicular to the shank appear in the WALTON wrench marked with this patent date. |
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