If you find a patent number or patent date by this manufacturer that is not on this
list, please contact the Site Historian.
Key to Links for Patent Information
USPTO = U.S. Patent Office .
Images of the actual patent can be viewed on the U.S. Patent Office web site but
a special TIFF viewer must be installed with your browser in order properly work.
More information on how to configure your computer to view these patents can be
found at TIFF image Viewers
for Patent Images.
DATAMP = Directory of American Tool And
Machinery Patents . A sister site to VintageMachinery.org with information
on patents related to machinery and tools. A much easier user interface than the
USPTO's for finding information on machinery patents.
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3,001,558
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Sep. 26, 1961
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Interchangeable wood cutter head
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William W. Showler |
Greensboro, NC |
This patent covers "hub mounted molder and shaper heads used in the furniture industry". See also Canada patent 643,022. The Concentro Service Corp. manufactured planer cutterheads that were apparently based on this invention. The cutterheads are made in segments, and each segment has carbide knives permanently attached. This type of cutterhead can go a very long time between sharpening, but to sharpen it the head must be removed from the machine, which probably explains why very few such heads have survived. They do appear to have worked very well, other than the sharpening hassle. |
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643,022
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Jun. 19, 1962
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Interchangeable wood cutter head
|
William W. Showler |
Greensboro, NC |
This patent covers "hub mounted molder and shaper head(s) used in the furniture industry." |