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2. Multiway switching - Wikipedia

   en.wikipedia.org/wiki/Multiway_switching

   A "4-way" (intermediate) switch is a purpose built double pole, double throw (DPDT) switch, internally wired in manufacture to reverse the connections between the input and output and having only four external terminals. This switch has two pairs of "traveler" terminals that it connects either straight through, or crossed over (transposed, or ...

3. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   Two light switches in one box. The switch on the right is a dimmer switch. The switch box is covered by a decorative plate. The first light switch employing "quick-break technology" was invented by John Henry Holmes in 1884 in the Shieldfield district of Newcastle upon Tyne. [1]

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5. John Henry Holmes - Wikipedia

   en.wikipedia.org/wiki/John_Henry_Holmes

   John Henry Holmes invented the quick break light switch in 1884. [ 8 ] which was patented in Great Britain [ 9 ] and the United States [ 10 ] that year. The technology radically improved the prior switch technology by ensuring the internal contacts moved apart quickly enough to deter the electric arcing that would create a fire hazard and ...

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

7. Sports News & latest headlines from every league - AOL.com

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

8. Additive manufacturing file format - Wikipedia

   en.wikipedia.org/wiki/Additive_Manufacturing...

   Additive manufacturing file format (AMF) is an open standard for describing objects for additive manufacturing processes such as 3D printing.The official ISO/ASTM 52915:2016 [1] [2] standard is an XML-based format designed to allow any computer-aided design software to describe the shape and composition of any 3D object to be fabricated on any 3D printer via a computer-aided manufacturing ...

9. 4-way - Wikipedia

   en.wikipedia.org/wiki/4-way

   4-way or Fourway can refer to: an acoustic system containing four loudspeakers; a formation skydiving event, "4-way sequential", that has four members in each team; a Symmetric multiprocessing system with 4 processors; Fourway Athletics, a Hong Kong football team; Four-slide; Four-way switch; 4-way stop; Fourway, Virginia (disambiguation)