US Patent: 820,519
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| Tool-Grinding Machine
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Patentee:
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| John G. Pool (exact or similar names) - Lynn, Essex County, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 27, 1905 |
| Granted: |
May 15, 1906 |
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Patent Pictures:
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Joel Havens
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Description: |
| Abstract:
My invention relates more especially to the grinding of a cutting-tool such as is described in an application. for United States Letters Patent, Serial No. 252,320, filed March 27, 1905,* by Edward E. Elder and myself as joint inventors for an improvement in plug-cutting machines, in which application there is shown a hollow cylindrical cutting - tool having advancing cutting points with retreating cutting-surfaces forming two V-like edges. To grind such a tool with a rotary grinder, it is desirable that the tool and grinder shall have such a movement with relation to each other that the surfaces to be ground shall be continuously presented thereto. To this end I have shown in the present embodiment of my invention a means for rotation, the tool and also a means for giving it a reciprocating movement parallel with its axis in order that the V-shaped edges may be properly ground. With these features are combined means for automatically feeding the grinder and the tool with relation to each other, so as to keep them in operative position. There is also provided means for adjusting the machine to grind tools of different diameters and having differently-shaped cutting edges from those shown that is, tools in which the distance from the tip of the point to the bottom of the V varies from o to that shown-that is, from a straight edge to a V-shaped edge even deeper than that shown. These and other novel details of construction will be explained in the following specification. Moreover, I have shown my invention embodied in a machine adapted to grind a cylindrical tool; but it will be apparent that it or certain of its features may be adapted to grind tools having a different cross-section.
Claim:
In a machine for grinding a rounding-tool provided with a serrated or V-shaped cutting edge, a continuously rotary toolholder for grasping and holding the said tool by the noncutting end or edge thereof, a rotary grinder and means for reciprocating said grinder and toolholder with relation to one another whereby the grinder may continuously follow the toothed or serrated edge of said tool as it is turned by the toolholder. |
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