Stewart-Warner is a US manufacturer of vehicle instruments. The company was founded as Stewart & Clark Company in 1905 by John K. Stewart. Their speedometers were used in the Ford Model T. In 1912 John Stewart joined with Edgar Bassick to make vehicle instruments and horns. Bassick owned Alemite Co and Stewart had bought the Warner Instrument Company, thus the name was changed to Stewart-Warner Corporation. The company started in Chicago and built a manufacturing plant on Diversey . The building kept expanding and finally covered one-million square feet (93,000 m²) and six floors. They also made radios and refrigerators.
In the 1980s the company was bought by British Tire & Rubber (BTR ) who in the early 1990s decided to relocate to Juarez, Mexico and Stewart-Warner was taken over by another management team. In early 1998 Stewart-Warner was bought by Datcon Instrument Company (later renamed to Maxima Technologies ), but kept the Stewart-Warner brand.
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