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US Patent: 186,783
Improvement in Safety-Valve Attachments to Utilize the Escape-Steam
Patentee: Henry G. Ashton (exact or similar names) - Boston, MA USPTO Classifications: 122/437, 137/540, 251/270, 251/272 Tool Categories: propulsion and energy : steam apparatus : steam safety valves Assignees: None Manufacturer: Ashton Valve Co. - Boston, MA Witnesses: Charles F. Sleeper J. E. Maynadier	Patent Dates: Applied: Nov. 29, 1875 Granted: Jan. 30, 1877 Reissue Information: Reissued as RE8,211 (May 07, 1878) Patent Pictures: 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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