US Patent: 486,697
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| Wrench
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Patentee:
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| Andrew J. Curtis (exact or similar names) - East Williamson, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 31, 1892 |
| Granted: |
Nov. 22, 1892 |
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Patent Pictures:
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Andrew J. Curtis patent November 22, 1892 |
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Stan Schulz
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Description: |
| A cam lever and tapered section of the shank combine to form a wrench adjustment that can easily be tightened by sliding the movable jaw. The cam lever has to be shifted to relax its grip to loosen the jaws. |
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