| US Patent: 52,065 
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| Wrench | 
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| Patentee: |  |
 | Joel Moulton (exact or similar names) - Boston, MA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Nov. 21, 1865 |  
| Granted: | Jan. 16, 1866 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | Joel Moulton Pat. Jan 16, 1866 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | The sliding jaw is held in place against rack teeth on the main shank by the cam action of the second handle. |  |