Movats Incorporated

Paul G Anderson

John A McMennamy

Thomas A Rak

Andrew P Burke

A Strain Follower comprises cantilevered beams mounted by gripping means on opposite sides of an object to be loaded, which beams are deflected in relationship to the deformation of the object by axial forces, and strain gages mounted on the beams and electrically within a wheatstone bridge circuit for providing an output representative of the axial deformation of the loaded object, while minimizing the impact, on the output by bending and torsional forces acting on the object.

Strain follower

A stem load determining system comprises a method and apparatus for determining the load developed on a threaded stem, including a valve stem driven by a valve operator. An integral component of the apparatus is a stem strain transducer uniquely designed to girp a threaded stem to define a guage length on the threaded stem and to detect and measure deformation of the stem at the guage length when subjected to a compressive or tensile load.

Stem load determining system

An apparatus for monitoring, measuring and recording rotational forces and torque within a valve actuator comprises a load cell supported between two arm members, one arm member being mounted stationary to the housing of the valve actuator and the other arm being interfaced for rotation with a worm gear within the actuator. The resulting connection between the two arm members, through the load cells, results in blocked rotation of the worm gear and development of torque within the actuator, which torque is monitored through measurement of the rotational force at the load cell and knowledge of the moment arm of the force at the load cell. A time related trace of the torque is provided and comparison and correlation is made to time traces of other system parameters.

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Cobb County, GA, United States of America

Paul G Anderson