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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251,322
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Dec. 20, 1881
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Screw-cutting machine
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Jesse Vandenburgh |
Cortland, NY |
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Screw-cutting machine
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James A. Gilkerson |
Cortland, NY |
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323,414
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Aug. 04, 1885
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Work-holding chuck
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Julian A. Giles |
Cortland, NY |
The 1885-11-14 American Machinist, page 7, has an article on Gilkerson's planer vise, which was made by the Gilkerson Machine Works of Homer, N. Y., in nine sizes from 4 to 24 inches width of jaw. The design shown in that article differs substantially from the patent in that the floating jaw attaches to its carrier by a beveled surfaces that tends to force the jaw downward as the adjustment screw is tightened. The patented vise provides three adjustment ranges of the movable jaw by means of pins protruding from either side of the base and hook-arms ("links") attached to either side of the jaw. The vise as implemented does away with this feature altogether, which means that even though the vise was advertised as "patented", the vise as built does not use the patented features. There is little doubt that in the overall design that the Gilkerson planer chuck is descended from the design shown in this patent. |