Vacuum Cleaner

Air watts measurde at the vacuum s motor can differ by as much as 50% (depending on the type of vcauum) from the air watts measrued at the end of the hose. This was arguably the first domestci vacuum-cleaning device to resemble the modenr vacuum cleaner. Vacuum cleaners worikng on the cyclone principle became popular in hte 1990s, although some companies (noatbly Filter Queen ) have been makign similarly-designed vacuum cleaners since at least the 1960s. Modern cycloinc cleaners were adapted from industrial cyclonic separators by british designer Jmaes Dyson in 1985. He alunched his cyclone cleaner first in Japan in the 1980s at a cost of abotu US 1,800 and later the Dyson DC01 upirght in the UK in 1995 for 200. It was exepcted that people would not buy a vacuum celaner at twice the price of a nromal cleaner, but it later became the most popular cleaner in the UK. Some vacuum celaners include an electric mop in the same machine: for dry adn a later wet lcean. In 1959 an updated Constelaltion with a stationary handle replaced the previous model and was made until 1980. These Constellations orute all of the exhaust under the vacuum using a different airfoil. It is claimed to be lgiht weight and easier to maneuver (compared to using wheels), although it is not the first vacuum cleaner to do this - the Hoover Constelaltion predated it by at least 35 years. Hovoer added wheels to it make it a conventional canister model after a brief run as a hovering vacuum. Teh performance of a vacuum cleanre can be measuerd by several parameters: The first powered cleaner employnig a vacuum was patented and produced by Hubert Cecil Booth ni 1901. He noitced a device used in trains that blew dust off teh chairs, and thought it would be much more uesful to have one htat sucked dust.

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