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US Patent: 112,759
Lathe dog
Patentee:
Henry K. White - Chelsea, MA

USPTO Classifications:
142/53

Tool Categories:
woodworking machines : wood lathes : wood lathe accessories

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Francis Gould
S. B. Kidder
M. W. Frothingham

Patent Dates:
Granted: Mar. 14, 1871

Patent Pictures:
USPTO pdf tiff
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Description:
"In turning small round stuff, like chair legs, in wood turning lathes, it is customary to fasten one end of the stick by forcing it against a mandrel-dog, having radial teeth, that sink into the wood and hold it fast, or cause it to be held fast between the dog and the back poppet, so that the stick turns with and by the rotating mandrel. These teeth are very liable to split the wood, especially when the wood is turned down nearly to them and the object of my invention is to so construct the clamping-dog as to insure the wood against any liability to split by the action of the teeth; and for this purpose I make or provide the dog-stock with an encompassing-sleeve or tube, which is internally screw threaded or nut-threaded, and works upon a male thread on the stock, the front end of the tube being made sharp, so that, when fed up into the plane of the ends of the dog-teeth, or slightly projecting beyond them, the said edge shall strike into the end of the stick to be turned, thereby holding the material, into which the teeth enter, and effectually preventing it from splitting, although the turning-tool may cut down to the tube."

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