US Patent: 499,920
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| Adjustable Wrench
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Patentees:
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| Willard H. Griffin (exact or similar names) - Henniker, NH |
| Elmer P. Nichols (exact or similar names) - Henniker, NH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 18, 1893 |
| Granted: |
Jun. 20, 1893 |
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Patent Pictures:
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Willard H. Griffin and Elmer P. Nichols patent June 20, 1893 |
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Stan Schulz
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Description: |
| Adjustable brace socket wrench; the jaws have a spring to open them and taper on the outside to set the size; a screw collar on the outside of the frame acts as the size adjustment.
This looks more robust than parallel patent 499,919. |
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