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A central vacuum cleaner (also known as built-in or ducted) is a type of vacuum cleaner appliance installed into a building as a semi-permanent fixture. Central vacuum systems are designed to remove dirt and debris from homes and buildings by sending dirt particles through piping installed inside the walls to a collection container inside a ...
Allen Benjamin Wilson (1823–1888) was an American inventor famous for designing, building and patenting some of the first successful sewing machines. He invented both the vibrating and the rotating shuttle designs which, in turns, dominated all home lockstitch sewing machines. With various partners in the 19th century he manufactured reliable ...
The vacuum magnetic permeability (variously vacuum permeability, permeability of free space, permeability of vacuum, magnetic constant) is the magnetic permeability in a classical vacuum. It is a physical constant , conventionally written as μ 0 (pronounced "mu nought" or "mu zero").
Vacuum Oil Company was an American oil company known for its Gargoyle 600-W steam cylinder motor oil.After being taken over by the original Standard Oil Company and then becoming independent again, in 1931 Vacuum Oil merged with the Standard Oil Company of New York to form Socony-Vacuum, later renamed to Mobil and eventually merging with Standard Oil of New Jersey (itself renamed to Exxon) to ...
Dirt Devil is a brand name originally introduced (or debuted) in 1981 by the Royal Appliance Manufacturing Co, an American vacuum cleaner and floor care company. The company and the brand are now owned by TTI Floor Care North America, a subsidiary of Hong Kong based Techtronic Industries, who also own Oreck, Vax, and Hoover North America.
Alexander Frederick Douglas-Home, Baron Home of the Hirsel, KT, PC (/ ˈ h juː m / HEWM; 2 July 1903 – 9 October 1995), styled as Lord Dunglass between 1918 and 1951 and the Earl of Home from 1951 until 1963, was a British statesman and Conservative politician who was Prime Minister of the United Kingdom from 1963 to 1964.
Henry is the brand name given to a cylinder vacuum cleaner made and sold by Numatic International, and is the only mass-produced consumer vacuum cleaner still made in the United Kingdom. [1] It is most notable for its cartoon eyes and mouth on the body of the vacuum cleaner, making a face, with the hose connector or hose as its nose.
In philosophy and early physics, horror vacui (Latin: horror of the vacuum) or plenism (/ ˈ p l iː n ɪ z əm /)—commonly stated as "nature abhors a vacuum", for example by Spinoza [1] —is a hypothesis attributed to Aristotle, later criticized by the atomism of Epicurus and Lucretius, that nature contains no vacuums because the denser surrounding material continuum would immediately fill ...