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US Patent: 122,756
Improvement in safety-valves
Patentee: William Camerer (exact or similar names) - Reading, PA USPTO Classifications: 137/533.25, 137/540, 251/152 Tool Categories: propulsion and energy : steam apparatus : steam safety valves Assignees: None Manufacturer: Ashton Valve Co. - Boston, MA Witnesses: W. E. Good E. J. Rauch	Patent Dates: Granted: Jan. 16, 1872 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Ashton Valve Co.
Description: This patent was subsequently by Henry G. Ashton in patent 291,126.

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