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US Patent: 221,763
Improvement in Grooving Irons
Patentee:
John W. Ammons - Columbia, MO

USPTO Classifications:
30/167.1

Tool Categories:
woodworking tools : planes : plane blades
woodworking tools : planes : plow planes
woodworking tools : planes : match planes

Assignees:
John W. Ammons - Columbia, MO
John P. Horner - Columbia, MO

Manufacturer:
Not known to have been produced

Witnesses:
F. D. Evans
I. O. Hockaday

Patent Dates:
Applied: Sep. 15, 1879
Granted: Nov. 18, 1879

Patent Pictures:
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Description:
Cutter cuts both the groove as well as chamfers the edge of the groove. This is to prevent the problems associated with fitting tongue and groove joints of either the edges breaking off and fouling the joint fit or the added step of manually chamfering the corners with a rabbet plane.

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