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US Patent: 264,859
Atmospheric hammer
Patentee: John C. Butterfield (exact or similar names) - Chicago, IL USPTO Classifications: 403/355, 403/55, 403/59, 403/66, 403/81, 72/432, 72/443, 74/568R, 74/581, 74/583, 74/589 Tool Categories: metalworking machines : forging machines : drop hammers Assignees: None Manufacturer: Not known to have been produced Witnesses: N. B. Smith R. D. O. Smith	Patent Dates: Applied: Oct. 21, 1879 Granted: Sep. 26, 1882 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: Improvements to patent 176,400.

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