Abstract: By mounting a longitudinally extending blade with a mounting block for pivotal movement about an axis perpendicular to the longitudinal axis of the blade, in combination with a distance measuring meter mounted to measuring engagement with the movable blade, a precision squareness measuring gauge assembly is achieved for providing highly accurate measurements of the angular relationship of one surface to a reference surface. In the preferred embodiment, the precision measuring gauge assembly also incorporates pivot limiting means for controlling the arcuate distance through which the blade is able to pivot. In this way, the entire arcuate travel distance of the blade is accurately measured and displayed on the meter, thereby providing a direct accurate measurement of any desired surfaces.

Abstract: An intermodal system for moving highway semi-trailers by rail transportation. With the system of the present invention, trailers of any length are carried on a plurality of rail bogies such that one end of the semi-trailer is carried by one rail bogie and the other end of the semi-trailer is carried by another rail bogie. Each rail bogie has a frame structure supported on spaced-apart, wheeled axles. The frame structure defines a central drop deck section having a stationary, longitudinally extended, planar platform. Each rail bogie further includes a trailer securement system. The trailer securement system includes a chock assembly for facilitating trailer loading through simultaneous rotational movement of the semi-trailer's wheels through an arc on the platform and translatory movement of the wheels along a predetermined longitudinal path on the platform. The chock assembly includes a transversely spaced pair of joined chock blocks normally arranged on one side of the semi-trailer's wheels.