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US Patent: 51,451
Improvement in Bung-Hole Reamers
Patentee:
Lyman Gray - Pittsburgh, PA

USPTO Classifications:
408/202

Tool Categories:
woodworking tools : hand drills : drill bits : tapered reamers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Josiah W. Ells
Eb. Williams, Jr.

Patent Dates:
Granted: Dec. 12, 1865

Patent Pictures: [ 1 | 2 ]
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Description:
Primary claims have to do with making the body of the auger hollow to collect the chips, the provision of a gaging index, and a spanning handle high enough to allow the chips to escape freely.

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