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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408,269
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Aug. 06, 1889
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Electric drill
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Imle E. Storey |
Boulder, CO |
The innovations are a system for supplying water or other lubricant to the cutting tool, a main frame supporting a sliding frame that holds the motor and cutter, and an arrangement of friction disks and gears that push the sliding frame forward; in addition the entire mechanism had provisions to keep out water and dust. So far as we know, this design was not manufactured, but less than a decade later the inventor would establish a series of companies to manufacture his motors and drilling machines. |