Fire extinguisher in the early 60s and Purple-K being developed by the US Navy in the late 1960s. Manually applied dry agents such as graphite for class D (metal) fires had existed since WWII, but it wasn't until 1949 that Ansul introduced a pressurized extinguisher using an external CO2 cartridge to discharge the agent. Met-L-X (sodium chloride) was the first extinguisher developed in the US, with graphite, copper, and several other types being developed later. In the 1970s, Halon 1211 came over to the United States from Europe where it had been used since the late 40s or early 50s. Halon 1301
Grinnell Company-General Fire Extinguisher Company Complex The complex was built for the largest manufacturer of automatic sprinklers and other fire protection products in North America. It was added to the National Register of Historic Places in 2003. Grinnell Company-General Fire Extinguisher Company Complex Grinnell Company-General Fire Extinguisher Company Complex is a historic factory complex located at Charlotte, Mecklenburg County, North Carolina. It was built in 1929-1930, and consists of a two-story office building and massive tall, one-story Grinnell manufacturing building. The office building is a reinforced concrete structure, with a brick veneer, a flat roof, and a parapet capped in concrete coping. The manufacturing building has