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2. Harvey Hubbell - Wikipedia

   en.wikipedia.org/wiki/Harvey_Hubbell

   His best-known inventions are the U.S. electrical plug [1] and the pull-chain light socket. [2] In 1888, at the age of 31, Hubbell quit his job as a manager of a manufacturing company and founded Hubbell Incorporated in Bridgeport, Connecticut, a company which is still in business today, still headquartered near Bridgeport. Hubbell began ...

3. History of AC power plugs and sockets - Wikipedia

   en.wikipedia.org/wiki/History_of_AC_power_plugs...

   U.S. patent 774,250.The first US power plug and socket dated 1904. Several early American electrical plug and socket arrangements were invented by Harvey Hubbell.On 26 February 1903 he filed two patent applications featuring 2-pin plugs and adaptors for using his plugs with existing designs of lamp sockets and wall receptacles.

4. AC power plugs and sockets - Wikipedia

   en.wikipedia.org/wiki/AC_power_plugs_and_sockets

   As early as 1885 a two-pin plug and wall socket format was available on the British market. By about 1910 the first three-pin earthed (grounded) plugs appeared. Over time other safety improvements were gradually introduced to the market. The earliest national [clarification needed] standard for plug and wall socket forms was set in 1915.

5. The best artificial Christmas trees of 2024, tested by AOL

   www.aol.com/lifestyle/best-artificial-christmas...

   $299 at Home Depot. ... and there’s even a foot pedal on the power cord that makes it easy to turn the lights on and off without unplugging the tree. ... with a flat back that sits flush against ...

6. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   The same patent had a second design, with a wall attachable receptacle, capable of receiving the same plug, thus being the first socket and plug design patented in the US. Later in 1904, he changed the design to flat blades (a design later incorporated in the NEMA 2 series), filled under the U.S. patent 774,251 Both these patents were granted ...

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