A fire extinguisher is a handheld device which protects us from fire. It is usually filled with either a dry or a wet chemical component which is used to extinguish small fires, and is often used during emergency situations. Fire extinguishers are of 4 major types, Class A, Class B, Class C, Class D. Class A extinguishers are mainly used for putting out fires in ordinary fires like wood, rubber, cloth, and plastic materials as well. Class B extinguishers are used for flammable liquids like grease, gasoline, alcohols, and similar substances like these. Class C extinguishers are used for electrical equipment fires. Finally, Class D extinguishers are used for flammable metallic substances such as potassium and sodium. The first ever fire extinguisher was built by an English author and inventor, George William Manby, along with an English apothecary and a phosphorus manufacturer, Ambrose Godfrey. They invented the extinguisher in the year 1819.
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