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US Patent: 952,320
Chuck
North Bros. version of the Millers Falls "protected spring" design.
Patentee:
Thomas J. Fegley (exact or similar names) - Philadelphia, PA

USPTO Classifications:
279/56

Tool Categories:
woodworking tools : hand drills : drill accessories

Assignees:
North Brothers Manufacturing Co. - Philadelphia, PA

Manufacturer:
North Brothers Manufacturing Co. - Philadelphia, PA

Witnesses:
Walter Chism
Wills A. Burrowes
William A. Barr
William E. Shupe

Patent Dates:
Applied: Sep. 02, 1909
Granted: Mar. 15, 1910

Patent Pictures:
Partial patent drawings
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Description:
Used in the "Yankee" series of eggbeater hand drills. The jaws are kept spread apart by springs which are hidden from interference by bits or other objects pushed blindly into the chuck. The chuck is tightened by rotating the shell so that the threaded spindle proceeds inward along the chuck centerline. The attorneys were Howson & Howson, which firm exists to the present day.

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