US Patent: 30,987
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| Improvements in Wrenches
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| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Dec. 18, 1860 |
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Patent Pictures:
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Ezra Ripley Pat. Dec. 18, 1860 |
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Stan Schulz
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Description: |
| The sliding jaw is held in position by a set screw which operates against a wedge-shaped slot cut in the back of the main shank. The wedge is deeper toward the fixed head, so strain on the movable jaw tightens the grip of the setscrew. |
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