US Patent: 2,557,822 
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| Column Lubrication for Radial Drills
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	        Patentee:
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 | William G. Hoelscher (exact or similar names) - Cincinnati, Hamilton County, OH |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Mar. 15, 1946 | 
 
| Granted: | 
Jun. 19, 1951 | 
 
 
 
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                        Joel Havens "Vintage Machinery" entry for American Tool Works Co. 
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        Description: |  
| Claim:
This invention relates to lubricating apparatus for machine tools. It is particularly directed to apparatus of this character for use in a radial drill. More particularly, the purpose of the invention is to maintain a film of oil between the column and the arm which has a sleeve portion encircling the column adapted to be raised and lowered on the column. The arm carries the drill head and it's driving and feeding mechanism. |  
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