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US Patent: 519,924
Screw Cutting Engine Lathe
Wendell Phillips Norton - Torrington, CT

USPTO Classifications:
169/24, 74/348, 82/140

Tool Categories:
metalworking machines : metal lathes : screwcutting lathes
metalworking machines : metal lathes : engine lathes
metalworking machines : metalworking machine mechanisms

Hendey Machine Co. - Torrington, CT

Hendey Machine Co. - Torrington, CT

William W. Mertz
Willard A. Roraback
J. H. Shumway
Lillian D. Kelsey

Patent Dates:
Applied: May 15, 1893
Granted: May 15, 1894

Patent Pictures:
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Hendey Machine Co. History
1915 Hendey 16" x 8' tie bar Lathe
"Vintage Machinery" entry for Hendey Machine Co.
Earle & Seymour - patent attorneys

This patent was an improvement to his Gearbox patent of March 8, 1892 (#470,591) and concerns the famous Single Tooth Dog Clutch Reversing Mechanism. The Quick Change Gear Box, the Dog Clutch Reversing Mechanism and the Automatic Stop Mechanism re-remained synonymous as the Hendey System until the end of production. (This information courtesy of Hendeyman)


My invention relates to an improvement in screw-cutting engine lathes, and more particularly to the device upon which United States Letters Patent No. 470,591 were granted to me under date of March 8, 1892, the object of my present invention being to produce a device of simple and comparatively cheap construction, having few parts, and not liable to derangement, durable, convenient in use, and adapted to a wide range of adjustment for varying the speed at which its feed screw shaft or lead-screw is driven.

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