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US Patent: 489,317
Tapping attachment for drills
Patentee:
Anton Mill - Cincinnati, OH

USPTO Classifications:
408/134, 74/353

Tool Categories:
metalworking machines : drilling and boring : tapping machines

Assignees:
None

Manufacturer:
Bickford Drill & Tool Co. - Cincinnati, OH

Witnesses:
T. Simmons
C. W. Miles

Patent Dates:
Applied: Jun. 06, 1892
Granted: Jan. 03, 1893

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Cincinnati-Bickford Tool Co.
Description:
The inventor was superintendent of the Bickford Drill & Tool Co. (which eventually became the Cincinnati-Bickford Tool Co.), and so we assume this tapping attachment was made by them.

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