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pantograph

[pan-tuh-graf, -grahf] /ˈpæn təˌgræf, -ˌgrɑf/
noun
1.
Also, pantagraph. an instrument for the mechanical copying of plans, diagrams, etc., on any desired scale.
2.
Electricity. a device usually consisting of two parallel, hinged, double-diamond frames, for transferring current from an overhead wire to a vehicle, as a trolley car or electric locomotive.
Origin
1715-1725
1715-25; panto- + -graph
Related forms
pantographer
[pan-tog-ruh-fer] /pænˈtɒg rə fər/ (Show IPA),
noun
pantographic
[pan-tuh-graf-ik] /ˌpæn təˈgræf ɪk/ (Show IPA),
pantographical, adjective
pantographically, adverb
pantography, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for pantographical

pantograph

/ˈpæntəˌɡrɑːf/
noun
1.
an instrument consisting of pivoted levers for copying drawings, maps, etc, to any desired scale
2.
a sliding type of current collector, esp a diamond-shaped frame mounted on a train roof in contact with an overhead wire
3.
a device consisting of a parallelogram of jointed rods used to suspend a studio lamp so that its height can be adjusted
Derived Forms
pantographer (pænˈtɒɡrəfə) noun
pantographic (ˌpæntəˈɡræfɪk) adjective
pantographically, adverb
pantography, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for pantographical

pantograph

instrument for duplicating a motion or copying a geometric shape to a reduced or enlarged scale. It consists of an assemblage of rigid bars adjustably joined by pin joints; as the point of one bar is moved over the outline to be duplicated, the motion is translated to a point on another bar, which makes the desired copy according to the predetermined scale. In the the links 2, 3, 4, and 5 are connected by pin joints at O, A, B, and C. Joint O is fixed to a support, while joints A, B, and C are free to move. Link 5 is a solid bar continuing on to Q. Point P is the guided point and is usually fixed on link 4. As P is guided on a specific path, such as the square in the , point Q will follow a similar path on an enlarged scale. Conversely, if point Q is guided, point P will follow a similar path on a reduced scale

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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