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  2. Trolley pole - Wikipedia

    en.wikipedia.org/wiki/Trolley_pole

    A trolley pole is not attached to the overhead wire. The pole sits atop a sprung base on the roof of the vehicle, with springs providing the pressure to keep the trolley wheel or shoe in contact with the wire. If the pole is made of wood, a cable brings the electric current down to the vehicle. A metal pole may use such a cable, or may itself ...

  3. Fireman's pole - Wikipedia

    en.wikipedia.org/wiki/Fireman's_pole

    Slide poles can be made safer. Cushions can be placed around the base of the pole to soften landings. Exhaust control systems can stop fumes from rising upstairs. To prevent accidental falls, the pole can be guarded by railings, baskets, a door or a weight-activated trapdoor that opens only when weight is applied to the pole. [6] [7]

  4. Evacuation slide - Wikipedia

    en.wikipedia.org/wiki/Evacuation_slide

    Evacuation slide used in an emergency drill. An evacuation slide is an inflatable slide used to evacuate an aircraft quickly. An escape slide is required on all commercial (passenger carrying) aircraft where the door sill height is such that, in the event of an evacuation, passengers would be unable to step down from the door uninjured (Federal Aviation Administration requires slides on all ...

  5. Pike pole - Wikipedia

    en.wikipedia.org/wiki/Pike_pole

    The head of a pike pole with various implements for pulling items The head of a short firefighter's pike pole. A pike pole is a long metal-topped wooden, aluminium or fiberglass pole used for reaching, hooking and/or pulling on another object. They are variously used in boating, construction, logging, rescue and recovery, power line maintenance ...

  6. Utility pole - Wikipedia

    en.wikipedia.org/wiki/Utility_pole

    A utility pole, commonly referred to as a transmission pole, telephone pole, telecommunication pole, power pole, hydro pole, telegraph pole, or telegraph post, is a column or post used to support overhead power lines and various other public utilities, such as electrical cable, fiber optic cable, and related equipment such as transformers and ...

  7. Scissors mechanism - Wikipedia

    en.wikipedia.org/wiki/Scissors_mechanism

    This mechanism is used in devices such as lift tables and scissor lifts.Modern low-profile computer keyboards make an extensive use of it as well, installing each key on a scissor support to ensure their smooth vertical movement, allowing the use of a cheap and reliable rubber dome contact set, instead of expensive and complex array of mechanical switches.