The Heart of the Heating Plant
The Consolidated Temperature Controlling Co. renamed itself Electric Heat Regulator Co in 1893. The first company ads featuring the now famous thermostat ran in 1895 . The company was purchased by W.R. Sweatt three years later. In 1916 he changed the name of the company to the Minneapolis Heat Regulator Company. The product line was expanded the same year and the company patented the first electric motor approved by Underwriters Laboratories. In 1927, Minneapolis Heat Regulator Company and Honeywell Heating Specialty Co. merged to form the Minneapolis-Honeywell Regulator Co., and became the largest producer of high-quality jeweled clocks. W. R. Sweatt became Chairman and Mark Honeywell became President. These old poster stamps, sometimes called a Cinderella or Posterette came out in 1913.