Hercules grease thermostat with oil pressure control for instant closing of radiator shutters
1933
Bunsen's thermostat, 1867.
1867
Motor car thermostat
Thermostat for Electrolux refrigerator, model G.5
Plug-in thermostat
Two P type thermostats, c1935
Sectioned "Smithermet" type X.19800 radiator thermostat
1931
Google Nest Learning Thermostat
2015