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US Patent: 1,506,367
Tapping attachment
Patentee: George W. Emrick (exact or similar names) - Brooklyn, NY USPTO Classifications: 192/21, 74/377 Tool Categories: metalworking machines : drilling and boring : tapping heads and chucks Assignees: Eastern Tube & Tool Co. - Brooklyn, NY Manufacturer: Eastern Tube & Tool Co. - Brooklyn, NY Witnesses: Unknown	Patent Dates: Applied: Jun. 23, 1922 Granted: Aug. 26, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for ETTCO Tool Co., Inc.
Description: The company would later claim that this patent covers the first tapping clutch. We have not (yet) tried to verify this claim.

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