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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 - Rockford, IL

USPTO Classifications:
29/283.5, 72/181, 72/48

Tool Categories:
metalworking machines : sheet metal : 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 pdf tiff
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"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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