US Patent: 302,595


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US Patent: 302,595

Auger Bit

Patentee:

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

USPTO Classifications:

408/212

Tool Categories:

woodworking tools : hand drills : drill bits : auger bits

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Fisk Shailer

Samuel R. Shailer

Patent Dates:
Applied:	May 29, 1884
Granted:	Jul. 29, 1884

Patent Pictures:

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Description:

Base of lead screw facing the usual single spur of a single-twist bit is cut partially away to provide additional clearance for the chip. Also, there is a secondary spur at the base of the lead screw, just ahead of the primary spur, to help break the resistance of the chip.