US Patent: 120,266
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| Improvement in Dies for Cutting Screw Threads
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Patentee:
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| John J. Grant (exact or similar names) - Greenfield, Franklin County, MA |
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Patent Dates:
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| Granted: |
Oct. 24, 1871 |
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Patent Pictures:
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John J. Grant patent October 24, 1871 |
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Stan Schulz
Wiley & Russell Mfg. Co. (vintagemachinery.org)
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Description: |
| Brown, Coombs & Co. - patent attorneys
This invention consists in the arrangement within the die-stock or holder, and between the dies, of taper or taper-headed adjusting-screws for setting out the dies, such screws operating, in combination with external set-screws, to obtain a perfect and secure adjustment of the dies.
This patent was the basis for the adjustable dies produced by Wiley & Russell. Patent nos. 303,060 and 306,723 are subsequent improvements.
Corresponding Canadian patent no. CA-1,765 was issued November 12, 1872 to J.J. Grant, Solon L. Wiley and Charles P. Russell of Greenfield, Mass.
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