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US Patent: 17,038
Expansive bit
Patentee:
Alexander Hall - New York, NY

USPTO Classifications:
408/194, 408/195, 408/213

Tool Categories:
woodworking tools : hand drills : drill bits : adjustable drill bits

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. Jay Hoope
John Hoope

Patent Dates:
Granted: Apr. 14, 1857

Patent Pictures:
USPTO pdf tiff
Google Patents
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Description:
The adjustable cutter passes through a mortise in the shank, and is secured by a pin.

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