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US Patent: 123,546
Improvement in Lock Safety-Valves for Steam-Boilers
Patentee: Henry G. Ashton (exact or similar names) - East Cambridge, Middlesex County, MA USPTO Classifications: 137/536, 137/543.23 Tool Categories: propulsion and energy : steam apparatus : steam safety valves Assignees: None Manufacturer: Ashton Valve Co. - Boston, Middlesex County, MA Witnesses: R. H. Eddy J. R. Snow S. N. Piper L. N. Müller	Patent Dates: Granted: Feb. 13, 1872 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Ashton Valve Co.

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