US Patent: 63,842 - Improvement in Wood-Boring Bits


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US Patent: 63,842

Improvement in Wood-Boring Bits

Patentee:

Charles Boernicke (exact or similar names) - Philadelphia, PA

USPTO Classifications:

175/202, 175/291, 408/26, 82/1.5

Tool Categories:

woodworking tools : hand drills : drill bits

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Louis C. Luning

Theodor Schafer

Patent Dates:
Granted:	Apr. 16, 1867

Patent Pictures:

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Description:

Hollow tube type bit designed to englarge the hole as it progresses. Specifically intended for use with round tenon joinery, providing for the use of a "foxtail wedge."