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Manufacturers Index - Hazard Knowles

Hazard Knowles
Washington, DC; New York, NY, U.S.A.
Manufacturer Class: Wood Working Machinery

This page contains information on patents issued to this manufacturer.

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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.

Patent Number Date Title Name City Description
X4,859 Aug. 24, 1827 Plane stocks of cast iron Hazard Knowles Colchester, CT This patent is the earliest American patent for a metallic plane, and it features prominently in both volumes of Roger K. Smith's books, "Patented Transitional and Metallic Planes in America."
According to Vol. I of PTAMPIA, "Apparently many other planemakers manufactured this type, either with or without license, because similar planes are known of various sizes and with minor design changes."
PTAMPIA Vol. II presents research relating to the manufacture of this design, including the fact that the known examples of the jointer plane also have Foster's patent 3,355 for a piece of soapstone inlet into the sole; in fact, Foster's patent, granted after this patent had already expired, shows a plane very similar to Knowles' design.
Several other Knowles patents were not restored after the 1836 patent-office fire: "Springs for carriages", 1825-11-04; "Mode of covering buildings", 1828-10-11; "Manufacturing wood screws", 1833-03-01; "Carriage to overcome obstruction in roads", 1833-08-29.