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Telescoping (mechanics)

Movement of one part sliding out from another From Wikipedia, the free encyclopedia

Telescoping (mechanics)
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Telescoping in mechanics describes the movement of one part sliding out from another, lengthening an object (such as a telescope or the lift arm of an aerial work platform) from its rest state.[1] Manually extended telescoping devices are common in modern products, for example they are used in umbrellas, selfie sticks, pop up canopy shelters, and (to extend handles) luggage. In heavy equipment, extention can be achieved by a hydraulics, but pulleys are generally used for simpler designs such as extendable ladders and amateur radio antennas.

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Showing the telescopic principle, an object collapsed (above) and extended (below), providing more reach.
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