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US Patent: 191,304
Improvement in wire screws and nuts
Patentee: John T. Bruen (exact or similar names) - Brooklyn, NY USPTO Classifications: 140/105, 408/124 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers woodworking tools : hand drills Assignees: None Manufacturer: Not known to have been produced Witnesses: C. Sedgwick Alex. F. Roberts	Patent Dates: Applied: Apr. 02, 1877 Granted: May 29, 1877 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin (GL)
Description: Describes how to twist wires together to form the shaft of an Archimedean device and than fit a nut to it.

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