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 booklet from 1905 showcases how American Radiator Company's radiators could become decorative pieces in a home. It highlights the "beauty in modern radiators" of tha...
American Radiator Company manufactured their Colonial Wall Radiators around 1905. The document attached below is an excerpt from The Ideal Fitter (1905) that states "The ...
Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.