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  2. Pull switch - Wikipedia

    en.wikipedia.org/wiki/Pull_switch

    The most common use of a pull switch is to operate a ceiling electric light.The ceiling fan and mechanical wall fans are also appliances often operated by pull switches. . Pull switches may be either two-position (open or closed) or multi-position (allowing for different fan speeds or levels of illuminati

  3. Pothead - Wikipedia

    en.wikipedia.org/wiki/Pothead

    A three phase electric circuit terminated with a pothead Crossarms with two three phase electric circuits terminated with potheads. A pothead is a type of insulated electrical terminal used for transitioning between overhead line and underground high-voltage cable or for connecting overhead wiring to equipment like transformers. [1]

  4. Potentiometer - Wikipedia

    en.wikipedia.org/wiki/Potentiometer

    The 'log pot', that is, a potentiometer has a resistance, taper, or, "curve" (or law) of a logarithmic (log) form, is used as the volume control in audio power amplifiers, where it is also called an "audio taper pot", because the amplitude response of the human ear is approximately logarithmic. It ensures that on a volume control marked 0 to 10 ...

  5. Fan (machine) - Wikipedia

    en.wikipedia.org/wiki/Fan_(machine)

    Five-blade or six-blade designs are rare. The materials from which the components are made, such as brass, are important factors in fan desirability. A ceiling fan is a fan suspended from the ceiling of a room. Most ceiling fans rotate at relatively low speeds and do not have blade guards because they are inaccessible and unwieldy.

  6. Propfan - Wikipedia

    en.wikipedia.org/wiki/Propfan

    A propfan, also called an open rotor engine, open fan engine [1] [2] or unducted fan (as opposed to a ducted fan), is a type of aircraft engine related in concept to both the turboprop and turbofan, but distinct from both. The design is intended to offer the speed and performance of a turbofan, with the fuel economy of a turboprop.

  7. Smudge pot - Wikipedia

    en.wikipedia.org/wiki/Smudge_pot

    A smudge pot (also known as a choofa or orchard heater) is an oil-burning device used to prevent frost on fruit trees. Usually a smudge pot has a large round base with a chimney coming out of the middle of the base. The smudge pot is placed between trees in an orchard. The burning oil creates heat, smoke, carbon dioxide, and water vapor.

  8. The Hum - Wikipedia

    en.wikipedia.org/wiki/The_Hum

    Three hums have been linked to mechanical sources. The West Seattle Hum was traced to a vacuum pump used by CalPortland to offload cargo from ships. After CalPortland replaced the silencers on the machine, reports of the hum ceased. [23] Likewise, the Wellington Hum is thought to have been due to the diesel generator on a visiting ship.

  9. List of Super Bowl commercials - Wikipedia

    en.wikipedia.org/wiki/List_of_Super_Bowl_commercials

    Two businessmen negotiate with a giant, light-up mouse-pointer hand. The hand mocks the first businessman's suggestions, noting that "A startup in Frisco made a mockery of your signing bonus." The businessman tells the hand "I don't like you." Kforce "Looking for a Job" A man leads someone through the red-light district of a city.