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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339,336
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Apr. 06, 1886
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Chuck
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Charles W. Shartle |
Middletown, OH |
This lathe "chuck" has work-holding jaws that pivot to bite into the work under cutting force. |
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394,729
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Dec. 18, 1888
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Slip-collar for pulleys
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Charles W. Shartle |
Middletown, OH |
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411,620
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Sep. 24, 1889
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Lathe-dog
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Charles W. Shartle |
Middletown, OH |
This lathe dog has a work-holding jaw that pivots to bite into the work under cutting force; this enables the set-screws to be thumbscrews as they do not need to be very tight to prevent the work from moving in the dog.
The 1889-08-29 American Machinist, page 3, has an illustrated article on this patent lathe dog. The manufacturer is identified as the "Middletown Machine Works" of Middletown. The 1897 catalog of machinery supplier Charles Besly & Co. features "Shartle's Bull Dog" lathe dogs on page 84; the dog shown matches the patent except that it has square-head set-screws rather than thumb screws. The November 1902 Modern Machinery, page 153, has an illustrated writeup on a split lathe-dog for axles that appears to be a descendant of this design; it was manufactured by the Shartle Brothers Machine Co. of Middletown (the Middletown Machine Co. having since switched its exclusive focus to gasoline engines). |
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521,055
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Jun. 05, 1894
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Slip-collar for pulleys, shafts, &c.
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Charles W. Shartle |
Middletown, OH |
The 1891-02-07 The Age of Steel, page 6, has a small display ad for "Shartle's Safety Set Collars", which closely match this patent's design. The ad is from Middletown Machine Co. |
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558,528
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Apr. 21, 1896
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Lubricator
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John M. Shartle |
Middletown, OH |
The Shartle name is associated with the Middletown Machine Co. and so the presumption is that this lubricator design was used by that firm. |
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658,594
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Sep. 25, 1900
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Gas Engine
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Charles W. Shartle |
Middletown, Butler County, OH |
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Gas Engine
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Charles E. Miller |
Middletown, Butler County, OH |
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