US Patent: 140,390 - Improvement in Process of Hardening Edge Tools


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US Patent: 140,390

Improvement in Process of Hardening Edge Tools

Patentee:

Leverett W. Stuart (exact or similar names) - Hawley, PA

USPTO Classifications:

148/588, 148/639, 29/90.01, 76/115

Tool Categories:

Assignees:

Gustavus Ames - Rochester, NY

Manufacturer:

Not known to have been produced

Witnesses:

Solon C. Kemon

Chas. A. Pettit

Patent Dates:
Applied:	Jun. 27, 1872
Granted:	Jul. 01, 1873

Patent Pictures:

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Description:

A previously hardened and tempered blade is further hardend by applying the edge under pressure against a revolving smooth faced metallic wheel. Application to edge tools, harvester cutters, and saw teeth.