![]() ![]() His invention paved the way for the creation of gas masks used during the First World War. In 1914, Garrett Morgan patented his 1912 invention, the Safety Hood and Smoke Protector, a device which allowed the user to breathe clean air along the floor and had moist sponges to improve the quality of inhaled air. John Stenhouse, a Scottish chemist, constructed early versions of the device following Haslett's design. The device also had a vent through which air was released back to the atmosphere. His invention worked through the use of a bulb-shaped filter to sieve dust from the inhaled air. He was the first person in the US to receive a patent for a gas mask. Haslett, an American engineer, created a device in 1847 that resembled modern-day gas masks. Alexander von Humboldt, a Prussian mining engineer, developed a primitive respirator to assist miners working in deep mines. In Persia, the Banu Musa brothers developed a primitive gas mask in the 9th century, and its primary purpose was to offer protection to people working in polluted wells. The Ancient Greeks were the first civilization to utilize gas mask they made use of the properties of the ordinary sponge as a primitive gas mask. Gas masks do not offer protection from corrosive gas which requires the user to wear protective clothing. Gas masks are fitted with filters each made to protect against a different toxin or group of toxins. Gas masks have evolved to protect the wearer from both gaseous and particulate toxins. Gas masks usually cover the mouth and the nose to protect the individual from airborne hazards, however, most gas masks now safeguard vulnerable tissues such as the eyes. The gas mask is an invention developed to protect individuals from toxins and poisonous substances that are in the air.
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