Weston Miller Fulton (August 3, 1871 – May 16, 1946) was an American meteorologist, inventor, and entrepreneur, best known for his invention, the "sylphon," a seamless metal bellows used in thermostats, switches, and other temperature-control devices. Fulton also invented an automatic river gauge while working for the U.S. Weather Bureau, and played a primary role in the development of the depth charge during World War I.