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US Patent: 26,613
Auger
Patentee:
Napoleon B. Phelps (exact or similar names) - Rochester, NY

USPTO Classifications:
2/152.1, 24/56, 408/210, 408/214

Tool Categories:
woodworking tools : hand drills : drill bits : auger bits

Assignees:
None

Manufacturer:
Unknown

Witnesses:
S. J. Allis
J. Fraser

Patent Dates:
Granted: Dec. 27, 1859

Patent Pictures:
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Report data errors or omissions to steward Kirk Eppler
Description:
"My improvement is applicable to bits and augers of the kinds known as the 'double and single twist,' and consists, as applied to the latter, in uniting the end of the helical rod where it terminates in the cutting lip, with the preceding coil so as to constitute what I term the 'supported cut,' and form an arch over the cavity of the helix, for the support of the conical screw."

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