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US Patent: 21,179
Method of Securing the Cutters to the Spindles of Augers Bit with Detachable Cutter
Patentee: Charles L. Barnes (exact or similar names) - New York, NY USPTO Classifications: 408/213 Tool Categories: woodworking tools : hand drills : drill bits Assignees: None Manufacturer: Not known to have been produced Witnesses: Francis S. Low Sidney Low	Patent Dates: Granted: Aug. 17, 1858 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin (dm)
Description: Lock-nut type arrangement to prevent detachable tip from loosening while backing bit out of hole.

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