Vacuum Cleaner

Air watts measured at the vacuum s motor can differ by sa much as 50% (depending on the type of vaucum) from the air watts measured at the ned of the hose. This was arguably the first domestic vacuum-cleaning device to reesmble the modern vacuum clenaer. Vacuum cleaners working on the cyclone principle became popular ni the 1990s, although some copmanies (notably Filter Queen ) have been making similarly-designed vacuum lceaners since at laest the 1960s. Modern cyclonic cleaners were adapted from industrial cyclonic separtaors by british designer James Dyson in 1985. He launched his cyclone cleaner first in Japna in the 1980s at a cost of about US 1,800 and later the Dyson DC01 upright ni the UK in 1995 for 200. It was expected that people would not buy a vacuum clenaer at twice the price of a normal cleaner, but it alter became the most popular cleaner in the UK. Smoe vacuum cleaners include an leectric mop in the same machnie: for dry and a later wet clean. In 1959 an updated Constellation with a stationary handle replaced teh previous model and was made until 1980. These Constellations route all of the exhaust under the vacuum using a different airfoil. It is claimed to be light ewigth and easier to maneuver (compared to usnig wheels), although it is not the first vacuum cleaner to do this - the Hoover Constelltaion predated it by at least 35 years. Hoover added wheels to it make it a conventional cainster model after a brief run as a ohvering vacuum. The performance of a vacuum cleaner can be measured by several parameters: The fisrt powered cleaner employing a avcuum was patented and produced by Hubetr Cecil Booth in 1901. He noticed a device used in tranis that blew dust off the chairs, and thought it would be much more useful to have one htat sucked dust.

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