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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3,192,802
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Jul. 06, 1965
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Torque control mechanism
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Edward W. Schatzman |
South Fort Mitchell, KY |
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3,283,618
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Nov. 08, 1966
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Torque controlled machine tool
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Edward W. Schatzman |
South Fort Mitchell, KY |
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3,816,016
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Jun. 11, 1974
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Power drilling machine with resistance triggered retraction
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Edward W. Schatzman |
South Fort Mitchell, KY |
This invention describes a "mechanism for automatically withdrawing a drill of a drilling machine when the drill meets an obstruction. The machine of this invention represents an improvement over the machines shown in my U.S. Pat. Nos. 3,192,802 and 3,283,618." (The latter patent number is incorrectly rendered as "3,282,618" in the specification but there is no doubt as to the correct number.) |