Perfex Series 155 Magic Dial Thermostat
Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.
Gorton Radiator Valve Patent
Here is a circa 1908 patent for one of Joseph Gorton's early ideas, his radiator appliance or valve. Thanks to Steve Pajek for finding and sharing this heating equipment patent with us.
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