US Patent: AI279 - Hollow auger


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US Patent: AI279

Hollow auger

Patentee:

Mahlon Gregg (exact or similar names) - Philadelphia, PA

USPTO Classifications:

30/495

Tool Categories:

woodworking tools : hand drills : drill bits : hollow bits

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Granted:	May 15, 1860

Reissue Information:
Reissue of 19,292 (Feb. 09, 1858)

Patent Pictures:

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Description:

Only the patent drawing is available. "Additional Improvement" patents were issued between 1836 and 1860 to allow patentees an easier way to make additional claims, improvements or clarifications. This drawing shows a hollow auger intended to be used with Gregg's Machine for Cutting Tenons on Spokes.