Honeywell Time-O-Stat Thermostat

The Time-O-Stat Controls Corporation of Elkhart, Indiana produced this Time-O-Stat thermostat around 1930. Time-O-Stat was a large company that specialized in control systems that had applications in a variety of industrial, commercial, and domestic applications. Time-O-Stat was purchased by the Minneapolis-Honeywell Regulator Company in 1934, who continued to sell a Time-O-Stat brand thermostat in the years following the acquisition and used Time-O-Stat control patents in future devices.
The ubiquity of thermostats in 21st century homes shrouds the decades of innovation, industrial design, and engineering that went into making them an everyday object in almost every home. In the early 20th century, a majority of American households still heated their homes with manually operated furnaces that required a trip down to the basement and stoking the coal fired furnace. Albert Butz’s “damper-flapper” system was patented in 1886 and allowed home owner to set the thermostat to a certain temperature which would open a damper to the furnace, increasing the fire and heating the house. Progressive innovations allowed for the thermostats to use gas lines, incorporate electricity, turn on at a set time, include heating and cooling in one mechanism, and even connect to the internet.
overall: 4 5/8 in x 2 3/8 in x 2 1/8 in; 11.7475 cm x 6.0325 cm x 5.3975 cm
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Work and Industry: Mechanical and Civil Engineering
Domestic Furnishings
Engineering, Building, and Architecture
Object Project
Exhibition Location
National Museum of American History
Data Source
National Museum of American History


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