| US Patent: 64,391 
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| Improvement in Dividers | 
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| Patentee: |  |
 | Horatio Whiting (exact or similar names) - New York, NY |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Granted: | Apr. 30, 1867 |  USPTO (New site tip)
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                        Ralph Brendler
 
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| Description: |  | This set of dividers features a captive nut mounted in one arm, which engages a rack cut into the arc joining the two legs. |  |