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US Patent: 432,635
Machine for Making Twist Drills
Patentee:
Samuel Moore (exact or similar names) - Providence, RI

USPTO Classifications:
72/194, 72/198, 72/250

Tool Categories:
tool making : making drills and augers

Assignees:
United States Twist Drill Co. - Providence, RI

Manufacturer:
Not known to have been produced

Witnesses:
Henry Marsh, Jr.
Nathan H. Fruman
Sullivan Henson

Patent Dates:
Applied: May 21, 1886
Granted: Jul. 22, 1890

Patent Pictures:
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Description:
Henry Marsh jr. - patent attorney

The purpose of my invention is to provide means for grooving and rolling drill-blanks uniformly and without injury to the metal and to perfect the side faces and grooved faces of the blank at the same operation of the machine

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