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US Patent: 1,222,052
magnetic chuck
Patentee: Oakley S. Walker (exact or similar names) - Worcester, MA USPTO Classifications: 269/8, 335/286, 409/903 Tool Categories: metalworking machines : grinders : magnetic chucks work holding : magnetic chucks Assignees: O. S. Walker Co. - Worcester, MA Manufacturer: O. S. Walker Co. - Worcester, MA Witnesses: Nellie Whalen Penelope Comberbach	Patent Dates: Applied: Jul. 23, 1914 Granted: Apr. 10, 1917 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for O. S. Walker & Co.
Description: In 1915 or '16, O. S. Walker & Co. reorganized as the O. S. Walker Co.

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