US Patent: 939,648


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US Patent: 939,648

Die-stock

Patentees:

Fred W. Wells (exact or similar names) - Greenfield, MA

Frederic E. Wells (exact or similar names) - Greenfield, MA

USPTO Classifications:

470/188

Tool Categories:

metalworking tools : tap and die holders

metalworking tools : taps and dies

industrial tools : taps and dies

Assignees:

None

Manufacturer:

Wells Brothers Co. - Greenfield, MA

Witnesses:

Alfred F. Smead

George H. Wilkins

Patent Dates:
Applied:	Jan. 06, 1908
Granted:	Nov. 09, 1909

Patent Pictures:

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Description:

This pipe-threading die-stock cuts the taper by moving the chasers radially outward as the cutter advances. It was subsequently improved in patent 962,184.