Method and arrangement for determining the linear (heat) expansion of elongated bodies

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United States of America Patent

PATENT NO 5189807
SERIAL NO

07829296

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Abstract

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A method for determining and, when appropriate, compensating for the linear (heat) expansion of elongated bodies (1), such as physical length scales (1) or of elongated bodies which are intended to support physical length scales on, e.g., instruments or measuring machines equipped with physical length scales, in which measurement errors occur because of length deviations of the scale (1) as a result of deviations from a reference temperature at which the scale was calibrated. The method is mainly characterized by measuring the linear expansion of the body (1) in relation to at least one reference (6) made of a material whose coefficient of linear (heat) expansion (.alpha.) deviates from the coefficient of linear (heat) expansion of the body material, and thereafter determining, when appropriate, a compensation factor for correcting the body length. The invention also relates to an arrangement for carrying out the method.

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Patent Owner(s)

Patent OwnerAddress
C E JOHANSSON ABS-631 81 ESKILSTUNA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gustafsson, Carl-Erik Eskilstuna, SE 5 24

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