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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131,669
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Sep. 24, 1872
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Improvement in scroll-sawing machines
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Thomas Wickliffe Dowling |
Pontiac, MI |
See also Canada patent {CA3,141}. |
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145,993
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Dec. 30, 1873
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Improvement in scroll-sawing machines
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Thomas Wickliffe Dowling |
Pontiac, MI |
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3,141
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Feb. 24, 1874
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Improvements on scroll-sawing machines
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Thomas Wickliffe Dowling |
Pontiac, MI |
This is the Canadian equivalent of US patent 145,993. The 1886 "Illustrated Catalog of Machinists' Tools and Wood Working Machinery" from John Bertram & Sons, pages 40-41 features Dowling's Patent Scroll Sawing Machine. "Having purchased the exclusive right to manufacture this machine in the Dominion, we can confidently recommend it... The saw has a constant strain through its whole stroke. This is effected by two spiral springs acting on steel levers which are attached to the upper slide direct, and all the reciprocating parts of this movement being made of steel-plate enables the machine to run at a high rate of speed with great smoothness..." |