Vacuum Cleaner Purifies Air (Dec, 1938)
Wouldn’t this be a bit loud?
Vacuum Cleaner Purifies Air
Small enough to rest on a bedside table, a vacuum cleaner now on the market has a special attachment that makes it useful for purifying the air in a sick room. Employing turbine-type blades instead of the conventional revolving fan to create suction, the unit draws room air in through a nozzle and passes it through a “germ trap” said to remove any dust and other impurities it may contain.