Pantograph (rail) facts for kids
A pantograph is a device that collects electric current from overhead lines for electric trains or trams. The term stems from the resemblance to pantograph devices for copying writing and drawings.
Pantographs easily adapt to various heights of the overhead wires by partly folding. The tram line pictured here ran in Vienna.
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Images for kids
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Close up of a single arm pantograph on a British Rail Class 333.

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Pantograph (rail) Facts for Kids. Kiddle Encyclopedia.