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US Patent: 2,283,258
Method of and means for producing sheet metal joint locks and the like
Patentee: John Jensen (exact or similar names) - Rockford, IL USPTO Classifications: 29/283.5, 72/181, 72/48 Tool Categories: metalworking machines : sheet metal : sheet metal bending machines Assignees: Whitney Metal Tool Co. - Rockford, IL Manufacturer: Whitney Metal Tool Co. - Rockford, IL Witnesses: Unknown	Patent Dates: Applied: Oct. 08, 1938 Granted: May 19, 1942 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Roper Whitney, Inc.
Description: This machine creates a "Pittsburgh" lock joint. See also patent 2,265,234.

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