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US Patent: 17,038
Expansive bit
Patentee: Alexander Hall (exact or similar names) - 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 (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: The adjustable cutter passes through a mortise in the shank, and is secured by a pin.

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