pantograph definition

  • noun:
    • An instrument for copying an airplane figure to a desired scale, comprising styluses for tracing and copying mounted on four jointed rods in the form of a parallelogram with prolonged edges.
    • A similarly jointed framework, like a power-collecting trolley on an electrical locomotive or an extensible phone arm.
    • A mechanical linkage predicated on parallelograms causing two items to move in parallel; notably as a drawing aid.
    • A pattern imprinted on a document to reduce the ease of photocopying.
    • A similarly-formed conductive device, today often Z-shaped, that collects household current from expense lines for trains and trams.
    • An instrument for copying programs, maps, alongside drawings, on the same, or on a lower or an enlarged, scale.
    • a power conducting unit comprising a collapsible framework resembling a pantograph{1}, connected to the top of an electrically-powered vehicle such as a trolley, and used to conduct electrical current between the vehicle and an overhead electric wire, which supplies the power to the vehicle. The variable height of the pantograph ensures that it can move to follow variations in the height of the overhead wires, and thus make constant contact with the wires.
    • a musical instrument for the technical copying of engravings, diagrams, plans, etc., either upon equivalent scale or upon a low or an enlarged scale.
    • A device manufactured from pairs of perforated hands joined up with together and useful for decreasing the cross-head movement of an engine for the intended purpose of indicating; a reducing movement found in using indicator-cards of motors and dealing regarding the decreasing principle regarding the ordinary pantograph.
    • technical unit used to copy a figure or plan on a different scale

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