US Patent: 16,997
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Wrench
Improved Adjustable Pincer-Wrench
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Patent Dates:
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| Granted: |
Apr. 07, 1857 |
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Patent Pictures:
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1 | 2
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Ezra Ripley patent April 7, 1857 |
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Stan Schulz
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Description: |
| Malleable iron 'levers' interlock to form an adjustable open end wrench. The drawings and specifications describe several options for attaining the interlock. Other tool functions shown in the drawing are not part of the patent. Some examples marked "E. Ripley's Patent April 7, 1857," some are unmarked. The variants shown in the 2nd illustration are copied from "Antique and Unusual Wrenches," by Schulzes. Later Ripley patents (e.g. 29,620) enhanced and expanded the tool's functions.
Cortland Ball's Sept. 9, 1862 wrench / hammer patent (no. 36,389) and A. D. Crosby's combination tool (no. 317,738) used a similar adjusting means. |
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