US Patent: 202,061 - Improvement in Augers


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US Patent: 202,061

Improvement in Augers

Patentee:

Henry L. Shaler (exact or similar names) - Deep River, CT

USPTO Classifications:

408/213

Tool Categories:

woodworking tools : hand drills : drill bits : auger bits

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

S. S. Selden

Gideon Parker

Patent Dates:
Applied:	Feb. 20, 1878
Granted:	Apr. 02, 1878

Patent Pictures:

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Description:

Primarily intended for the manufacture of smaller diameter auger bits, the idea was to lengthen the lead screw, then cut threads only on part of its length. The goal was to manufacture an effective lead screw with less risk of damaging the spurs.