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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1,158,832
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Nov. 02, 1915
|
Dog
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Carl A. Palmgren |
South Chicago, IL |
The assignee, Steel Art Tool Co., was acquired by the Wm. A. Field Co. |
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1,285,350
|
Nov. 19, 1918
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Tool
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Charles A. Palmgren |
Chicago, IL |
"My invention relates to cutting and boring tools... It has for its object to provide a new and improved milling tool for cutting an annular channel about a predetermined axis in a block or billet of steel preparatory to using a hollow drill in such channel to form an elongated core which subsequently be removed for purposes of analysis..."
We strongly suspect that the inventor was Carl A. Palmgren; we know that Carl went by "Charles" when he was working for the Illinois Steel Co. between 1900 and 1917. We also know that he left Illinois Steel to work at Steel Art Tool Co. |
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1,425,213
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Aug. 08, 1922
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Drill chuck
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Carl A. Palmgren |
Chicago, IL |
We presume that this chuck was made by Steel Art Tool Co., as the inventor was known to have been working there in 1918 and they made drill chucks. |