US Patent: 30,431
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Screw-Wrench
Improvement in Screw-Wrenches
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Patentee:
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| George C. Taft (exact or similar names) - Worcester, MA |
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Patent Dates:
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| Granted: |
Oct. 16, 1860 |
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Patent Pictures:
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George C. Taft patent October 16, 1860 |
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Stan Schulz
Taft's Patent Double-Acting Cylinder Wrench (FLICKR)
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Description: |
| Double acting adjusting screw patent. The adjusting nut has two sizes and styles of female threads.
One example corresponding to this design is marked only with the patent date; another includes "T. H. Dodge." Yet another includes "Worcester Tool Co." At least three sizes are known; an 1865 ad lists 7 sizes from 6 inch through 21 inch in "bright" and "black" finish.
This patent was among a group that were either assigned or licensed to Thomas H. Dodge and other investors. In the course of depositions for the "Collins Co. v. Coes" suit and counter-suit, Taft testified about the circumstances surrounding production of this and other of his wrench patents from the late 1850s - early 1860s. He said this one saw production by the Dodge & Wellington partnership for approximately two years. |
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