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2. List of vacuum cleaners - Wikipedia

   en.wikipedia.org/wiki/List_of_vacuum_cleaners

   An early electric vacuum cleaner by the Electric Suction Sweeper Company, circa 1908, predecessor of the Hoover vacuum cleaner (1922).. This is a list of vacuum cleaners and robot vacuum cleaner manufacturers.

3. The Hoover Company - Wikipedia

   en.wikipedia.org/wiki/The_Hoover_Company

   The first upright vacuum cleaner was invented in June 1908 in North Canton, Ohio by department store janitor and occasional inventor James Murray Spangler.Spangler was an asthmatic, and suspecting the carpet sweeper he was using at work was the cause of his ailment, he created a basic suction-sweeper by mounting an electric fan motor on a carpet sweeper and then adding a soap box and a broom ...

4. City of Cape Town - Wikipedia

   en.wikipedia.org/wiki/City_of_Cape_Town

   Cape Town first received local self-government in 1839, with the promulgation of a municipal ordinance by the government of the Cape Colony. [3] When it was created, the Cape Town municipality governed only the central part of the city known as the City Bowl, and as the city expanded, new suburbs became new municipalities, until by 1902 there were 10 separate municipalities in the Cape ...

5. Currys plc - Wikipedia

   en.wikipedia.org/wiki/Currys_plc

   Currys plc is a British multinational electrical and telecommunications retailer and services company headquartered in London, [4] which was formed in 2014 by the merger of Dixons Retail and Carphone Warehouse Group.

6. Hubert Cecil Booth - Wikipedia

   en.wikipedia.org/wiki/Hubert_Cecil_Booth

   Hubert Cecil Booth (4 July 1871 – 14 January 1955) [1] was an English engineer, best known for having invented one of the first powered vacuum cleaners. [2] [3] [4] [5]He also designed Ferris wheels, [1] [6] suspension bridges and factories. [1]

7. Vacuum permittivity - Wikipedia

   en.wikipedia.org/wiki/Vacuum_permittivity

   Vacuum permittivity, commonly denoted ε 0 (pronounced "epsilon nought" or "epsilon zero"), is the value of the absolute dielectric permittivity of classical vacuum. It may also be referred to as the permittivity of free space, the electric constant, or the distributed capacitance of the vacuum.