A patent for H.G. Ashton's Improvement in Lock Safety Valves for Steam Boilers.
(Courtesy of Rick Ashton, great great grandson of Henry G. Ashton who started the Ashton Valve company in 1872. The company was built on the popularity of his patented "pop" safety valve.)
The Improved Webster Type "R" System of Steam Heating is a service bulletin from Warren Webster and Company (The Pioneers of Vacuum Steam Heating), established in 1888.
This manual was created by O-E Specialty Manufacturing Co. and outlines how to install the "O-E" Perfect System, which is a Vapor Vacuum heating system.
Here is the original Installation and Operating Instructions and Parts List for The H.B. Smith Company's Oil Fired Cast Iron Hot Water Boilers (No. OHB-13W). This is esti...