US Patent: 365,629 
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| Lubricator
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	        Patentee:
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 | James Powell (exact or similar names) - Cincinnati, Hamilton County, OH |  
 
 
 
 
 
 
 
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        Patent Dates:
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| Applied: | 
May 18, 1886 | 
 
| Granted: | 
Jun. 28, 1887 | 
 
 
 
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		  Patent Pictures:
	      
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                        Joel Havens "Vintage Machinery" entry for William Powell Co. 
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        Description: |  
| Abstract: 
This invention relates to those devices commonly known as "sight-feed lubricators" and the first part of my improvements comprises a novel combination of appliances for securing the sight-feed tube between the bottom of the oil-reservoir and the base upon which the latter is mounted. The aforesaid combination includes a windowed bushing, an annular flange, a cylindrical chamber, a sight-feed tube, and a set of counterbores. 
Claim: 
A sight-feed lubricator consisting of the reservoir A, having at bottom a discharge-nipple, O, annular counterbores P R, and chamber a , in combination with a detachable base, Wi', provided with an annular counter-bore, U, discharge-channel V, annular flange w, and suitable retaining devices, as X X', a transparent tube, Q, being confined within said counterbores P U, and( a bushing, T, having one or more openings, t, being clamped between said counterbore R and the upper end of said annular flange w. |  
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