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US Patent: 1,270,444
Chuck
Patentee: Joseph H. Rusby (exact or similar names) - Nutley, NJ USPTO Classifications: 279/69 Tool Categories: woodworking tools : hand drills : drill chucks Assignees: None Manufacturer: J. Rusby - Newark, NJ Witnesses: Unknown	Patent Dates: Applied: Dec. 13, 1915 Granted: Jun. 25, 1918 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: This drill chuck remains tight regardless of whether the drill is rotated clockwise of counter-clockwise.

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