US Patent: 3,890,116 
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| Grinding Machine
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	        Patentee:
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 | Edward G. Robillard (exact or similar names) - Cherry Valley, Worcester County, MA |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Dec. 03, 1973 | 
 
| Granted: | 
Jun. 17, 1975 | 
 
 
 
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                        Joel Havens "Vintage Machinery" entry for Heald Machine Co. "Vintage Machinery" entry for Cincinnati Milling Machine Co. 
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        Description: |  
| Abstract:
A grinding machine with a stepping motor for feed movements, with a slow pulse generator and a fast pulse generator, and with a control means for introducing pulse from the fast generator during one part of the grinding cycle and from the slow generator during another portion of the grinding cycle. |  
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