Challenging Racism / December 15, 2021
African American “T.J. Marshall is credited with improving the design of the fire extinguisher, with a patent issued on March 26, 1872. He invented a system in which water is pumped through pipes in buildings to individual sprinkler heads. The system can be activated by manually turning a valve in the building. Marshall’s fire-extinguishing sprinkler system has been in use in the United States since 1874. It was commonly used in large factories as an…