| US Patent: 474,566 
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| Wrench | 
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| Patentee: |  |
 | Silas B. Rittenhouse (exact or similar names) - Liberty Mills, IN |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Sep. 22, 1891 |  
| Granted: | May 10, 1892 |  
 
USPTO (New site tip)| Patent Pictures: |  |  |  | Silas B. Rittenhouse patent May 10, 1892 |  Google Patents
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                        Stan Schulz
 
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| Description: |  | Springs between the frame and base of the jaws keep the jaws open.  An adjusting rod with fingers has screw adjustment toward the end of the handle. |  |