US Patent: 6,221 - Means of auger manufacture


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US Patent: 6,221

Combined Convex and Concave Auger
Means of auger manufacture

Patentee:

Nathaniel C. Sanford (exact or similar names) - Meriden, CT

USPTO Classifications:

408/214, 408/230

Tool Categories:

woodworking tools : hand drills : drill bits : auger bits

Assignees:

None

Manufacturer:

Nathaniel C. Sanford & Co. - Meriden, CT

Witnesses:

Charles W. Curtiss

Jno. S. Beach

Patent Dates:
Granted:	Mar. 27, 1849

Patent Pictures:

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Description:

The auger blank begins with additional material (i.e, the "convex" portion) for a short section of what will be the cutting end of the auger. The purpose is to facilitate finishing the cutting lips, etc. in the best manner.