Measuring and testing – Gravitational determination
Patent
1998-11-06
2000-06-27
Williams, Hezron
Measuring and testing
Gravitational determination
310 905, 74572, G01M 112, G05G 100
Patent
active
060792671
ABSTRACT:
Gravitational acceleration is measured in all spatial dimensions with improved sensitivity by utilizing a high temperature superconducting (HTS) gravimeter. The HTS gravimeter is comprised of a permanent magnet suspended in a spaced relationship from a high temperature superconductor, and a cantilever having a mass at its free end is connected to the permanent magnet at its fixed end. The permanent magnet and superconductor combine to form a bearing platform with extremely low frictional losses, and the rotational displacement of the mass is measured to determine gravitational acceleration. Employing a high temperature superconductor component has the significant advantage of having an operating temperature at or below 77K, whereby cooling may be accomplished with liquid nitrogen.
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Dvorscak Mark P.
Kwok Helen C.
Moser William R.
Smith Bradley W.
The United States of America as represented by the United States
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