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  2. Electric fireplace - Wikipedia

    en.wikipedia.org/wiki/Electric_fireplace

    The electric fire was invented in 1912 [2] and became popular in the 1950s. [3] Electric fireplaces found in 1950s homes were typically small and could be easily moved. [4] Techniques for electrical "flame effects" have been around since at least 1981. [5] Commercial electric fireplace techniques include the Optiflame, introduced in 1988 by ...

  3. Industrial and multiphase power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/Industrial_and_multiphase...

    In British English the general term is socket, but there are numerous common alternatives, including power point, [5] plug socket, [6] wall socket, [7] and wall plug. [8] In American English receptacle and outlet are common, sometimes with qualifiers such as wall outlet , electrical outlet and electrical receptacle , all of these sometimes to ...

  4. History of AC power plugs and sockets - Wikipedia

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

    During the first 50 years of commercial use of electric power, standards developed rapidly based on growing experience. Technical, safety, and economic factors influenced the development of all wiring devices and numerous varieties were invented. After the two-prong electric plug was introduced in the 1920s, the three-pin outlet was developed.

  5. Fireplace - Wikipedia

    en.wikipedia.org/wiki/Fireplace

    Electric fireplaces can be built-in replacements for wood or gas or retrofit with log inserts or electric fireboxes. A few types are wall mounted electric fireplaces, electric fireplace stoves, electric mantel fireplaces, and fixed or free standing electric fireplaces. Masonry and prefabricated fireplaces can be fueled by:

  6. Fireplace insert - Wikipedia

    en.wikipedia.org/wiki/Fireplace_insert

    A fireplace insert [1] is a device that can be inserted into an existing masonry or prefabricated wood fireplace. Fireplace inserts can be fuelled by gas, wood, electricity, coal, or wood pallet. Most fireplace inserts are made from cast iron or steel. Fresh air enters through vents below the insert, where it then circulates around the main ...

  7. 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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