Online Encyclopedia

INVAR

Online Encyclopedia
Originally appearing in Volume V14, Page 717 of the 1911 Encyclopedia Britannica.
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INVAR  , an alloy of

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nickel and
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steel, characterized by an extremely small coefficient of thermal expansion; it is specially useful in the construction of pendulums and of
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geodetic measuring apparatus, in fact, in all
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mechanical devices where it is an
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advantage to avoid temperature
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compensation . The name was chosen as expressing the invariability of its dimensions with
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heat .

End of Article: INVAR
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INVARIABLE PLANE

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