Apparatus for making non-contact angular deflection measurements

Details Apparatus for making non-contact angular deflection measurements Apparatus for making non-contact angular deflection measurements

1985-11-26

1987-05-26

Levy, Stewart J.

Electricity: measuring and testing

Magnetic

Displacement

73 59, G01B 714, G01N 1114

Patent

active

046689117

ABSTRACT:
An angular displacement indicating apparatus includes internal and external magnets disposed so that the external magnet tracks the internal magnet when a shaft to which the internal magnet is connected rotates. The external magnet is connected to a rotary variable differential transformer, for example, so that the external magnet moves from a null position in response to rotation of the internal shaft thereby causing the transformer to generate an electrical signal proportional to the angle of rotation of the shaft. Embodiments of the invention include external connecting mechanisms which can be moved to physically indicate the actual angle of deflection of the internal shaft.

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SPE 9285--Transition Time of Cement Slurries Between the Fluid and Set State.

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