| US Patent: 1,761,121 
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| Tripping Mechanism | 
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| Patentees: |  
 | Benjamin P. Graves (exact or similar names) - Edgewood, Providence County, RI |  | Walter F. Smith (exact or similar names) - Providence, Providence County, RI |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Aug. 20, 1928 |  
| Granted: | Jun. 03, 1930 |  USPTO (New site tip)
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                        Joel Havens
 "Vintage Machinery" entry for Brown & Sharpe Mfg. Co
 
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| Description: |  | We have seen this patent number, one of about 50 listed, on a No. 2B Plain Mill from Brown & Sharpe. |  |