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US Patent: 87,150
Sharpening Machine
Improvement in Machines for Grinding the Knives of Mowing Machines
Patentee:
Benjamin F. Davis - Auburn, NY

USPTO Classifications:
451/372

Tool Categories:
metalworking machines : grinders : tool grinders

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. B. Stoughton
Edmund Masson
John D. Patton

Patent Dates:
Granted: Feb. 23, 1869

Patent Pictures:
USPTO pdf tiff
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Description:
A. B. Stoughton - patent attorney

Many forms of these sickle-section grinding-machines have been made and patented but much remains to be done to make them cheap, portable, and efficient, and to accomplish, in a perfect manner, the object and purpose for which they are designed. My invention has for its object the more ready bringing up of the edges to be ground, to the face of the stone, and the afterward moving of the edge to be ground, on the face of the stone, but in a true plane, by which means the grinding is more rapid, and the face of the stone prevented from glazing.

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