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US Patent: 652,643
Thread-cutting attachment for lathes
Edward Rivett - Boston, MA

USPTO Classifications:
82/110, 82/158

Tool Categories:
metalworking machines : metal lathes : metal lathe accessories

Rivett-Dock Co. - Camden, NJ

Rivett Lathe Manufacturing Co. - Boston, MA

Margaret A. Dunn
George W. Gregory

Patent Dates:
Applied: Dec. 23, 1899
Granted: Jun. 26, 1900

Patent Pictures:
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"Vintage Machinery" entry for Rivett Lathe Manufacturing Co.
The inventor assigned the patent to "the Rivett-Dock Company, of Camden, New Jersey, and Faneuil, Massachusetts."

This lathe attachment works by engaging a series of cutters that progress from rough heavy cuts to a fine finishing cut, which was claimed to produce the same quality results as a single-point finishing tool in less than a third the time. This attachment is shown in an advertisement in the June 30, 1910 issue of American Machinist; the ad was from the Rivett Lathe Mfg Co., and the tool was called the Rivett-Dock Threading Tool.

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