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US Patent: 63,842
Improvement in Wood-Boring Bits
Patentee:
Charles Boernicke - 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:
USPTO pdf tiff
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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."

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