| US Patent: 56,996 
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| Wrench Improvement in Wrenches
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| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Granted: | Aug. 07, 1866 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | Newton & Favro Pat. Aug. 7, 1866 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | The jaws are shown angled, but could be set at right angles to the shank; the adjusting knurl at the end of the handle is held in place with a set screw, and a second set screw provides a "limit stop" for the movable jaw. A washer between the adjusting knurl and shank reduces friction. |  |