US Patent: 12,318


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US Patent: 12,318

Auger

Patentee:

Russell Jennings (exact or similar names) - Deep River, CT

USPTO Classifications:

408/213

Tool Categories:

woodworking tools : hand drills : drill bits : auger bits

Assignees:

None

Manufacturer:

Russell Jennings Mfg. Co. - Deep River, CT

Witnesses:

Charles W. Snow

Egbert C. Pratt

Patent Dates:
Granted:	Jan. 30, 1855

Reissue Information:
Reissued as RE2,081 (Oct. 03, 1865)

Patent Pictures:

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Description:

Double twist auger bit with the cutting edges designed so that the vertical scores follow the chisel. This design is so that the cutting edges of scores and chisel never intersect the worm or helix of the shaft at the same point.