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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176,400
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Apr. 18, 1876
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Improvement in atmospheric hammers
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John C. Butterfield |
Chicago, IL |
This atmospheric hammer design was written up in the 1876-09-16 Engineering News, which said that "a hammer built under this patent is now on exhibition in Philadelphia". That exhibit was by H. H. Scoville. We could find no evidence that Scoville, or anyone else, ever manufactured it. This patent was subsequently improved in patent 264,859, and the fact that Butterfield improved his design does provide indirect evidence that his original hammer design was used. |
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201,646
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Mar. 26, 1878
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Improvement in ore crushers and grinders
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Charles M. Brown |
Chicago, IL |
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230,612
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Aug. 03, 1880
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Power-hammer
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Charles M. Brown |
Chicago, IL |
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