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US Patent: 7,087
Planing-machine
Patentee:
Nicholas G. Norcross - Middlesex County, MA

USPTO Classifications:
144/117.1, 144/248, 144/252.1, 225/6, 225/89, 225/90, 29/DIG82

Tool Categories:
woodworking machines : cutter head machines : wood planers

Assignees:
None

Manufacturer:
Nicholas G. Norcross - Lowell, MA

Witnesses:
Unknown

Patent Dates:
Granted: Feb. 12, 1850

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Nicholas Norcross
"Vintage Machinery" entry for the Boston Conductory Co.
Description:
This patent covers two important features: the planer pressure bar, and the use of air currents to blow the wood chips into a "conductory", a passage, that carried them safely away. This patent was litigated all the way to the U. S. Supreme Court where it prevailed against the Woodworth patent. See the VintageMachinery.org link on this page for more information.

Some years after this patent was issued, Henry D. Stover was granted a patent, 30,993, that had a similar "conductory" feature. Stover then set up a patent holding company, the Boston Conductory Co., to try to secure licensing fees from the users of many different machines that used a similar principle. Stover would not take any of those users to court because he apparently realized that his patent would not withstand close scrutiny because of the existence of prior art in the form of this Norcross patent. A coalition of planing machinery makers publicized this fact and the Boston Conductory Co. disappeared. For another important Norcross planer patent, see 10,844.

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