Abstract: A graphics drawing method minimizes the number of predetermined images required to perform a plot on or within a web browser. A limited number of previously generated images or overlay tools are provided, referred to herein as “image tiles”, which are then tiled and stretched by the user to define the desired graphic. The overlay tools are selected as required to improve image quality.

Abstract: An extensometer measures and monitors changes in complex loads on a structure. The extensometer comprises opposed cantilever beams fixed in “mirrored” position and aligned with the structure. Each beam has a fixed end and a free end. The fixed end of the cantilever beam is attached to the structure being monitored. The free ends are attached to each other through a compliant, linearly elastic sensing element that is distorted by rigid-body motions of the cantilever beams relative to their attachments to the structure. The sensing element is capable of first order isolation of signals from discrete components of deflections of the structure in proportional response to the strains or stresses on the structure.

Abstract: A tensiometer for measuring tension in a tubular, such as a cable, using segmented sheave assemblies is provided. The precision of a tension measurement, and the bending stress to which the tubular is exposed during the tension measurement, are functions of the effective radii of sheaves comprising the tensiometer. A segmented sheave assembly is much smaller dimensionally than a sheave wheel with the same effective radius. For given operating specifications, the tensiometer comprising segmented sheave assemblies is, therefore, much more compact than a tensiometer comprising conventional sheave wheels.