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US Patent: 346,310
Chuck
Patentee:
James F. O'Neill - Torrington, CT

USPTO Classifications:
279/107

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

Assignees:
Hendey Machine Co. - Torrington, CT

Manufacturer:
Not known to have been produced

Witnesses:
F. F. Fuessenich
Charles L. McNeil
J. H. Shumway
Fred C. Earle

Patent Dates:
Applied: May 19, 1886
Granted: Jul. 27, 1886

Patent Pictures:
USPTO pdf tiff
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Hendey Machine Co. History
"Vintage Machinery" entry for Hendey Machine Co.
Description:
John E. Earle - patent attorney

Abstract:

This invention relates to an improvement in the construction of chucks, such as are applied to a revolving mandrel to hold metal articles to be turned or finished, and particularly to that class of articles which are externally or internally screw-threaded. If the article to be wrought or finished is screwed into a chuck, the work upon the article tends to make the screw-connection the more firm as the work progresses, and it is with difficulty that the article can be removed.

Various devices have been made to make the removal of the article from the screwthreaded chuck easythat is, to prevent the screw-thread binding in the chuck. It is to this class of chucks that my invention particularly relates, the object of the invention being to provide a chuck with jaws adapted to engage the screw-thread of the article, and hold it firm while being wrought, and then by releasing the grasp of the jaws the article may be readily removed; and it consists in the construction of the chuck, as hereinafter described,and particularly recited in the claims.

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