If you find a patent number or patent date by this manufacturer that is not on this
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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
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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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506,717
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Oct. 17, 1893
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Machine for making core-supports
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Alvin W. Needham |
Detroit, MI |
These core-supports are also called chaplets or anchors, and are used to hold cores in position during casting. We know that Crescent Machine Works of Grand Rapids made chaplets and that our inventor, A. W. Needham, was a partner in that business in the late 1890s. Crescent likely made these machines for its own use but did not manufacture them in quantity. |