old patents....

jpf321

As I find interesting old patents, I will post them here...

<ul><li><a href="http://www.google.com/patents?id=vKlrAAAAEBAJ">Gorton Radiator Vent Valve - 1950 issue</a></li><li><a href="http://www.google.com/patents?id=kSVmAAAAEBAJ">Gorton Radiator Valves - 1955 issue</a></li><li><a href="http://www.google.com/patents?id=j5FrAAAAEBAJ">Gorton Steam Radiator Valves - 1965 issue</a></li><li><a href="http://www.google.com/patents?id=WZpFAAAAEBAJ">Hoffman Swivel Tube Connection - 1931 issue</a></li><li><a href="http://www.google.com/patents/about?id=pnhmAAAAEBAJ">Improvements in Steam Radiators - 1877 issue</a></li><li><a href="http://www.google.com/patents?id=kU4tAAAAEBAJ">Hoffman Valve for Steam Heating Systems - 1904 issue</a></li><li><a href="http://www.google.com/patents?id=LfR9AAAAEBAJ">Hoffman Automatic Air Valve - 1908 issue</a>

</li><li><a href="http://www.google.com/patents?id=6iZJAAAAEBAJ">Hoffman Automatic Air Valve - 1918 issue</a>

</li><li><a href="http://www.google.com/patents?id=RIhDAAAAEBAJ">Hoffman Air Valve Lock - 1928 issue</a>

</li><li><a href="http://www.google.com/patents?id=-KpDAAAAEBAJ">Hoffman Thermostatic Steam Trap - 1931 issue</a>

</li><li><a href="http://www.google.com/patents?id=wLV4AAAAEBAJ">Hoffman Faceless Valve - 1935 issue</a>

</li><li><a href="http://www.google.com/patents/about?id=2KNAAAAAEBAJ">Hoffman Boiler Return Trap - 1935 issue</a>

</li><li><a href="http://www.google.com/patents/about?id=2aNAAAAAEBAJ">Hoffman Steam Trap - issue 1936</a>

</li><li><a href="http://www.google.com/patents/about?id=6jhGAAAAEBAJ">Hoffman Thermostatic Relief Valve - issue 1936</a>

</li><li><a href="http://www.google.com/patents/about?id=gr1KAAAAEBAJ">Hoffman Adjusting Means for Air Valves</a>

</li><li><a href="http://www.google.com/patents?id=mK9jAAAAEBAJ">Hoffman Adjustably Vents Air Valve - 1940 issue</a>



If anyone finds other interesting ones, please post .. a great resource is <a href="http://www.google.com/patents">www.google.com/patents</a></li></ul>

Big-Al_2

Thanks!

I enjoyed those, especially the diagram of the steam radiator with built in "chimneys" to induce air movement.  Very cool idea . . .