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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69,292
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Sep. 24, 1867
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Improvement in Calipers and Dividers
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Edward Wright |
Worcester, MA |
Separate spring from the arms which allows lower cost construction and replacement if the spring happens to break. Known example only marked with patent date. An improved version of this tool was patented in 1887 (#355,430), which added a quick-release nut to the threaded rod.
The inventor has over 40 patents to his credit, mostly dealing with cotton manufacturing, but he also hold the patent to a well-known patented butt gage, #505,868. |
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237,654
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Feb. 08, 1881
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Tool Support for Lathes
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Edward Wright |
Worcester, Worcester County, MA |
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355,430
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Jan. 04, 1887
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Rapidly-Adjustable Nut for Calipers and Dividers
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Jacob D. Wright |
Worcester, MA |
This is an improvement to the earlier E. Wright patent (#69,292 - 9/24/1867), which adds a quick-adjust nut to the adjustment mechanism. If the caliper legs are squeezed, the nut releases and can be slid to any point on the threaded rod.
Known examples are marked with the manufacturer's name and patent date. |