Warren S. Johnson
Warren Seymour Johnson (born November 6, 1847 in Leicester , Vermont , † December 5, 1911 in Los Angeles ) invented the electric room thermostat .
In the fall of 1876 he became a professor of mathematics, science and drawing at the state normal school in Whitewater, Wisconsin . He experimented at home in his private laboratory, mainly on lead batteries. In 1883 he received a patent for the first electric room thermostat. In the same year he went to Milwaukee , where he and William Plankinton founded the Johnson Electric Service Company (for the manufacture, installation and maintenance of automatic temperature control systems for buildings). In 1885 they went public.
Until his death he also occupied himself with electrical storage batteries, gas-powered automobiles, pneumatic tower clocks (since January 1, 1899 in Philadelphia City Hall; since 1905 Louisiana Purchase Exposition in St. Louis) and wireless telegraph transmission. Around 1900 he had hired Lee de Forest , who started with radio experiments here and later invented the audion .
The company name (company) was changed to Johnson Service Co. in 1902 and Johnson Controls in 1974 . In 1910 the first sales office was founded in Europe.
Johnson was posthumously inducted into the National Inventors Hall of Fame in 2018 .
Web links
- Warren Seymour Johnson. Family of Charles DeForest Johnson (1298) & Emeline McCullough. Archived from the original on May 22, 2006 ; Retrieved January 3, 2008 .
| personal data | |
|---|---|
| SURNAME | Johnson, Warren |
| ALTERNATIVE NAMES | Johnson, Warren Seymour (full name) |
| BRIEF DESCRIPTION | inventor |
| DATE OF BIRTH | November 6, 1847 |
| PLACE OF BIRTH | Leicester , Vermont |
| DATE OF DEATH | December 5, 1911 |
| Place of death | los Angeles |