Abstract: A collection of couplers and a corresponding coupling method that removably connect existing forensic scales to create a coupled scale, wherein a ruler arm of each scale is slidingly engaged in a track of the coupler that provides and maintains arm-to-arm angular accuracy for scales coupled in a fixed angle, co-planar joint, and measurement accuracy of scale markings across the joint. The track includes a lower surface; two laterally opposed parallel edge walls extending up from the lower surface and spaced apart by a dimension suitable for slidingly engaging a ruler arm width; holding tabs that extend laterally inward from both edge walls spaced above the lower surface by a dimension suitable for slidingly engaging a ruler arm thickness; an open end; and preferably a longitudinally distal registration stop. Two coupler tracks are joined with co-planar lower surfaces; and an edge wall of each joined at a fixed angle vertex.

Abstract: The invention relates to a measuring stick, particularly a folding measuring stick, having a stop (1) that, at one end of the measuring stick (7), extends transversal to the longitudinal axis of the measuring stick (7). The inventive measuring stick is characterized in that a magnetic element (2a, 2b) is placed at the end of the measuring stick (7), and the stop (1) is formed by an element (1) made of a ferromagnetic material.

Abstract: A device for measuring and marking lines and points on a steel I-beam includes a rib for contacting the outside of an I-beam flange along a line opposite the center of the beam web, a measuring blade that rests on the beam web and measures distances from the outside of the flange, and a bridge for connecting the measuring blade to the rib in a way in which the measuring blade is held perpendicular to the flange. The device marks I-beams faster and more accurately that was possible using prior art tools and techniques.

Abstract: A ruler device is disclosed. It comprises a ruler body, a spring member disposed on an upper surface of the ruler body such that the spring member is warped upwardly, and a slip-preventive member disposed on a lower surface of the ruler body, the slip-preventive member being caused to project downwardly when the spring member is depressed.

Abstract: A method for accurately determining the location of a pre-selected survey or construction mark, or for accurately identifying the survey position for a new mark with pre-selected location coordinates. A Satellite Positioning System (SPS), such as GPS or GLONASS, with at least two SPS stations (antennas and receiver/processors) is used to receive and analyze SPS signals from four or more SPS signal satellites. An SPS signal reference station is placed at a position with known location coordinates, which can be stationary or be known functions of time. An SPS signal roving station receives the location coordinates of the reference station and determines its own location coordinates relative to the reference station, using SPS differential positioning. The roving station is then moved to a pre-selected survey mark or position, either to locate that survey mark or to identify (by marking) a new survey position from pre-selected location coordinates.

Abstract: A method for using an endoscopic apparatus for measuring the size of a hernia defect comprising a handle which is pivotally attached to a measuring rod. The hernia defect is measured by a plurality of calibrations positioned along the measuring rod. The measuring rod includes a blunt tip at its distal end and further is adaptable for 180' positioning relative to the handle.

Abstract: A measuring assist device which attaches to a surveying or measuring rod to aid in, but not limited to, measuring the depths (inverts) and/or sizes (inside or outside diameters) of pipes within structures such as manholes, catch basins, inlets, valve vaults, etc.

Abstract: A device for measuring wear of linings of a clutch, especially a motor vehicle clutch, with the clutch including a clutch-actuating device which has a push rod displaceable as a function of a position of, for example, a clutch pedal. A push rod includes a larger diameter portion which can be measured in a vicinity of a measurement point by means of a gauge, whereby the push rod acts upon a throwout fork which is adapted to be displaced as lining wear increases from a basic position in a direction of the push rod and indicate a need for replacement as a result of a predetermined change in diameter indicated by the group. The increased diameter portion of the push rod is formed by a frustoconical sleeve displaceable on the push rod. The sleeve is displaceable by a stop provided on a portion of a housing of the clutch when the clutch is thrown out for the first time into a fixed position corresponding to a maximum lining thickness.