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US Patent: 295,093
Pressure-gage-testing apparatus
Patentee: Charles E. Ashcroft (exact or similar names) - Lynn, MA USPTO Classifications: 73/1.65 Tool Categories: propulsion and energy : steam apparatus : stationary boilers : steam pressure gauges Assignees: None Manufacturer: Crosby Steam Gage & Valve Co. - Boston, MA Witnesses: William Edson Helen M. Feegan	Patent Dates: Applied: Aug. 31, 1883 Granted: Mar. 11, 1884 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin owwm.org discussion and photos of this apparatus Vintage Machinery entry for Crosby Steam Gage & Valve Co.

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