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US Patent: 1,796,790
Attachment for automatic screw machines
Patentee: Edwin S. Ingraham (exact or similar names) - Waterbury, CT USPTO Classifications: 269/229, 29/51, 408/44, 470/167, 470/181 Tool Categories: Assignees: Blake & Johnson Co. - Waterbury, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 02, 1928 Granted: Mar. 17, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Blake & Johnson Co.
Description: Of interest because the assignee also made a pedestal grinder.

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