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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66,672
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Jul. 16, 1867
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Improvement in upright drills
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Parritt Blaisdell |
Worcester, MA |
This early drill press was perhaps the most successful design of its era. Although P. Blaisdell & Co. made other metal-working machinery, including shapers, planers, and lathes, their drill presses made up the bulk of their business. |
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79,634
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Jul. 07, 1868
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Improvement in loose pulleys
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E. S. Capen |
Worcester, MA |
|
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135,313
|
Jan. 28, 1873
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Improvement in drilling-machines
|
Parritt Blaisdell |
Worcester, MA |
|
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426,588
|
Apr. 29, 1890
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Upright drill
|
Samuel E. Hildreth |
Worcester, MA |
|
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432,179
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Jul. 15, 1890
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Friction-clutch
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Ebenezer S. Capen |
Worcester, MA |
|
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637,769
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Nov. 28, 1899
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Compound rest for engine-lathes, &c.
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Enoch Earle |
Worcester, MA |
Between at least 1883 and 1905 Enoch Earle was a partner is P. Blaisdell & Co. of Worcester; in 1902 he was treasurer. |
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758,628
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May. 03, 1904
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Engine-lathe
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Enoch Earle |
Worcester, MA |
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