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US Patent: 24,773
Hollow Auger
Pump-Log Hollow Auger
Patentee:
Arcalous Wyckoff - Elmira, NY

USPTO Classifications:
408/204

Tool Categories:
woodworking tools : hand drills : drill bits : hollow bits
woodworking machines : wood drilling and boring

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
A. G. Reynolds
A. B. Galatian

Patent Dates:
Granted: Jul. 12, 1859

Reissue Information:
Reissued as RE2,204 (Mar. 13, 1866)

Patent Pictures:
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"Vintage Machinery" entry for Arcalous Wyckoff
Description:
The aperture in the cutter is slightly elliptical, with the primary cutters (a) placed at the smaller dimension. The core-piece, therefore, is slightly smaller in diameter than the inside of the tubing body, reducing friction. Also, there are secondary cutters (d) just behind the primary cutters, which make shear cuts on a tangent to the core, with the aim of smoothing the core's surfaces and further reducing friction.

This patent was granted an extension by/before 1874.

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