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Most general pumps can increase as well as decrease the pressure of a gas; however, this category contains pumps that are usually exclusively used to decrease pressure. Wikimedia Commons has media related to Vacuum pumps .
Air and dust are sucked at high speed into the collection vessel at a direction tangential to the vessel wall, creating a fast-spinning vortex. Roughly speaking, the dust particles and other debris spiral outward to the wall of the vessel by centrifugal force , where they fall due to gravity into the bottom of the collection bin.
"This movement was a key design feature as it has a double connected bellows, meaning that movement in either direction created a vacuum." The second person could use the attached hose then to clean the house. The dust was collected in a cotton bag within the machine. An example of this can be seen at the Walthamstow Pumphouse Museum
The Enciclopedia Libre was founded by contributors to the Spanish Wikipedia who decided to start an independent project. Led by Edgar Enyedy, they left Wikipedia on 26 February 2002, and created the new website, provided by the University of Seville for free, with the freely licensed articles of the Spanish Wikipedia. [3]
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The van Musschenbroek vacuum pump is an instrument from the late 17th century constructed by the Dutch craftsman Johannes Joosten van Musschenbroek . A series of pumps were designed and produced over the years, with the 1698-model as one of the more prominent examples. It was based on an air pump design by Wolferdus Senguerdius . [1]
Dust is made of fine particles of solid matter. [1] On Earth, it generally consists of particles in the atmosphere that come from various sources such as soil lifted by wind (an aeolian process), volcanic eruptions, and pollution. Dust in homes is composed of about 20–50% dead skin cells. [2]