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Mine Safety Appliances, or MSA Safety Incorporated, is a maker of sophisticated safety products that help protect workers who may be exposed to a variety of hazardous conditions. The company’s product line includes gas monitoring and detection instruments, filter-type respirators, gas masks, breathing apparatus used by firefighters, thermal imaging cameras, firefighter helmets, ballistic body armor, military communications systems, a broad range of industrial head and fall protection products, and safety products for Do-It-Yourself consumers.〔The Wall Street Journal. "(Mine Safety Appliances Co. )." Retrieved Feb 28, 2013.〕〔Bloomberg Businessweek. "(Mine Safety Appliances Co (MSA:New York) )." Retrieved Feb 28, 2013.〕 Key markets include construction, military, fire service, chemical production, oil and gas, and general industry.〔〔 MSA is based in the Pittsburgh suburb of Cranberry.〔Yahoo Finance. "(Mine Safety Appliances Co. (MSA) )." Retrieved Jan 10, 2013.〕 With help from Thomas Edison the company was formed in 1914〔 to develop a battery-powered cap lamp for miners to help prevent methane-related explosions caused by open flame lamps. Since the turn of the 21st Century, MSA has seen record sales. Only a small portion of the company's current products involve mining related products. The company’s competitors include Industrial Scientific Corporation, RAE Systems and Dräger.〔Wikinvest. "(Competition )." Retrieved Apr 26, 2013.〕 The corporation's assets are managed through two business segments: MSA North America and MSA International. MSA has sales and manufacturing operations throughout the world and sells products to customers in more than 140 countries. While the majority of MSA's products are available only through distributors, the company does sell head, eye, ear, respiratory and body protection products to individuals through a variety of hardware and home center retail outlets. ==Breathing sets== Mine Safety Appliances Co. has been manufacturing oxygen breathing apparatus for decades.〔()〕 Their "Chemox" chemical rebreather, primarily designed for use in mines, has been modified for use on Mt. Everest in 1952 and 1986. They are stated to be simple in construction and operation. It is essentially a canister of potassium superoxide connected to one-way flow valves to an air bag and thence to the user, as in Rebreathers whose absorbent releases oxygen hereinabove. There are no controls or operable valves of any kind. Breathing rate controls oxygen production. The main disadvantage is the 4-lbs canisters are good for only about 45-minutes of rapid climbing before another canister must be switched in. The canisters supply about 6 hours of sleeping oxygen. Also, during WWII in the 1940s, they were awarded a contract to make plastic helmet liners for the M1 Helmet 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mine Safety Appliances」の詳細全文を読む スポンサード リンク
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