Word: filtered
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Dates: during 1940-1949
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...room home." Savings on cleaning and replacements are substantial; savings on health cannot be figured although the Precipitron catches pollen and bacteria. Not even tobacco smoke, which has the finest particles found in the air (16,000 side by side are no wider than a pinhead), escapes its electrical filter...
...Army nurses always carry 200 cc. (about 6½ oz.) of blood of the "universal" type in an ampule-named for its inventor, Dr. S. Seltsovsky of Kiev-provided with a sterilized rubber tube, needle and filter. Blood transfusions can thus be given to wounded soldiers even before the nurse shoulders and carries them, with their guns, off the battlefield...
Garner invented the basic design for the filter while working on an experimental tractor during World War I. Later he sold filters to C. L. Best, big California tractor builder, which subsequently was merged into Caterpillar. Though Caterpillar changed to another filter, Garner kept as his peacetime customers such firms as Cleveland Tractor, John Deere, Allis-Chalmers, Case...
When war came Vortox soon got orders from builders of both light and medium tanks. Made in several designs, the commonest form of filter looks like a glorified five-gallon oilcan painted Army green. Inside is a complicated mechanism whereby incoming air is subjected to centrifugal action and to a violent cleansing oil spray before being passed along to the carburetor...
...responsible for the show's success is a smart Hollywood free lance radio writer named Robert Leigh Redd. Vetoing stuffy talks, Redd sold NBC and the Army on a heartwarming story of A.W.S. volunteers at work. Like an efficient census-taker, he visited 2,000 observation posts and filter centers, jotted down true stories of the modern air Reveres that give the program its dramatic highlights. Some of them...