Here are circa-1909 patents for H.K & I.Z. Kriebel's air and vacuum controlling device, as well as their system of steam heating and air and vacuum controlling device, automatic air valve, and check valve. Thanks to Gerry Gill for finding and sharing these patents.
This document contains the complete illustrated instructions for installing the Hercules Steam and Hot Water Heating System, a boiler manufactured by Sears, Roebuck and C...
This document contains the manufacturer's instructions for the HB Smith Series M450L Mills Water-Tube Boiler for automatic firing with oil or gas (Steam, Vapor, or Water ...
This document contains the jacket assembly instructions for the HB Smith Series 45 Mills Boiler (circa 1979).