A gas mask is a device used to protect the wearer from inhaling airborne pollutants and toxic gases. It forms a sealed cover over the nose and mouth, and may also cover the eyes and other vulnerable soft tissues of the face. It can be worn in a variety of situations, including chemical, biological, radiological and nuclear (CBRN) emergencies [1].
The protective efficiency of masks is influenced by several factors, such as the aerosol particle size and type, the mask’s filter material, gas flow, pressure differential, and fitness. The relationship between the filtration efficiency and the aerosol particles is analyzed. The current development problems of masks are summarized, and the future development trend is put forward.
Black inventor Garrett Morgan developed a prototype of a gas mask in 1914, before Haldane began his work on chemistry-based filtration materials, but his device wasn’t designed for battle. He faced racism and had difficulty selling his masks, which he called safety hoods.
This display was created by Melissa Glover, archival assistant in the Faculty of Medicine Founders’ Archive at Memorial University and is located in the Medical Education Centre, second floor of the Health Sciences Library. The display includes an exact replica of the World War I gas mask designed by Dr. Macpherson and excerpts from his notebooks.
This kit comes complete with a military-grade gas mask and NBC-77 SOF filter, potassium iodide tablets, and a leg-mounting pouch to help you prepare in case of a disaster. It’s ideal for anyone who wants to be prepared, and it’s easy to store in your house or car for emergency use.