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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79,682
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Jul. 07, 1868
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Improvement in circular-saw mills
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Frank J. Plummer |
Worcester, MA |
In the 1871 Worcester Directory, Frank J. Plummer does not have an occupation listed. His residence was at 6 Westminster. By 1878 he was partnered with Edwin N. Boynton in the firm of Boynton & Plummer. |
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97,959
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Dec. 14, 1869
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Mechanical movement
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Osgood Plummer |
Worcester, MA |
The inventor would later be a partner in metalworking machinery maker Boynton & Plummer. |
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135,613
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Feb. 04, 1873
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Improvement in drilling-machines
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Edward J. Worcester |
Worcester, MA |
Tentatively identified as a patent seen on a Boynton & Plummer drill press. |
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209,646
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Nov. 05, 1878
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Improvement in metal-drilling machines
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Edwin N. Boynton |
Worcester, MA |
Partner Plummer had worked for R. Ball & Co. in the 1860s, but by 1871 he seemed to be on his own. In 1871 Boynton was running E. A. Bagley & Co., which made screws. Co-inventor Carver went on to be a partner in engine lathe maker McMahon & Carver |
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Improvement in metal-drilling machines
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George M. Coburn |
Worcester, MA |
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Improvement in metal-drilling machines
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Thomas F. Carver |
Worcester, MA |
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274,026
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Mar. 13, 1883
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Post for drilling machines
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Osgood Plummer |
Worcester, MA |
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480,907
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Aug. 16, 1892
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Drilling-machine
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James Kindred |
Worcester, MA |
This patent covers a mechanism to automatically disengage the feed when the drill reaches its limit of movement. |
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520,142
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May. 22, 1894
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Drilling-machine
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Asa Goddard |
Worcester, MA |
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