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GB Patent: GB-181,604,010
Method of making an auger
Patentee:
John Sorby (exact or similar names) - Sheffield, county York, England

USPTO Classifications:

Tool Categories:
agricultural : augers

Assignees:
None

Manufacturer:
John Sorby & Sons - Sheffield, county York, England

Witnesses:
Unknown

Patent Dates:
Granted: Mar. 23, 1816

Patent Pictures:
Espacenet patent
Report data errors or omissions to steward Jeff Joslin
Description:
We have not been able to locate drawing or specification for this patent. According to a 1989 article, "On the evolution of drill-bit shapes," in the Journal of Mechanical Working Technology, "In 1816 John Sorby incorporated screw points into a pod auger and into a straight-fluted auger having an "S" section. Unfortunately, regarding the latter innovation, Sorby does not provide details of what would appear to be an interesting and unique cutting tool. It seems that he was attempting to utilise two curved cutting edges that operated simultaneously, instead of the single shearing action employed in the split-lip pod auger."

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