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US Patent: 1,080,507
Trap-Valve Mechanism
Patentee: John Bain Armstrong (exact or similar names) - Wilkes-Barre, Luzerne County, PA USPTO Classifications: 137/192, 137/419, 137/424 Tool Categories: propulsion and energy : steam apparatus : stationary boilers : steam and water separators Assignees: William Lloyd - Wilkes-Barre, Luzerne County, PA John Lloyd - Wilkes-Barre, Luzerne County, PA John Bain Armstrong - Wilkes-Barre, Luzerne County, PA W. H. Nicholson & Co., Inc. - Wilkes-Barre, Luzerne County, PA Manufacturer: W. H. Nicholson & Co. - Wilkes-Barre, Luzerne County, PA Witnesses: Harry Samuel Nicholson William Raymond Nicholson	Patent Dates: Applied: May 31, 1913 Granted: Dec. 02, 1913 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens Vintage Machinery entry for W. H. Nicholson & Co.
Description: Improvements to patent 839,777 to simplify construction.

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