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US Patent: 140,832
Improvement in sharpening-machines
Machine for dressing lathe centers
Patentees:
Joseph Rigney - Bridgeport, CT
James P. Kealy - Bridgeport, CT

USPTO Classifications:
408/124, 408/22, 451/155, 451/436, 451/65

Tool Categories:
metalworking machines : grinders : sharpening machines
metalworking machines : grinders : sharpening machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Michael Eberhard
David Shattuck

Patent Dates:
Granted: Jul. 15, 1873

Patent Pictures:
USPTO pdf tiff
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