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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239,072
|
Mar. 22, 1881
|
Spring-Calipers
|
Frederick J. Thomas |
Athol, MA |
Another quick-adjust mechanism for calipers and dividers, that uses a split nut to allow the legs to be quickly adjusted to rough size then finely adjusted to the exact measurement. |
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306,429
|
Oct. 14, 1884
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Inclinometer
|
Henry Murdock Rich |
Athol, MA |
|
|
368,308
|
Aug. 16, 1887
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Surveyor's transit
|
Charles F. Richardson |
Athol, MA |
This patent transit was a relatively low-cost device that sold very well. In about 1895 the inventor took his son, Fred, as partner, and then in 1905 they merged with another company to create Richardson-Oliver, which soon sold the transit line to L. S. Starrett Co., who continued to manufacture this transit for several years. |