| US Patent: 215,836 
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| Improvement in Lock-Nuts | 
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| Patentee: |  |
 | George W. Rhines (exact or similar names) - Ridgway, PA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Mar. 05, 1879 |  
| Granted: | May 27, 1879 |  USPTO (New site tip)
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                        Stan Schulz
 
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| Description: |  | The patent is for a set-screw within a bore-hole in the side of a nut. The specifications and drawing describe a socket wrench to tighten this set-screw. |  |