Abstract: A measuring tool for checking frameworks, comprising a fixed part intended to be suspended between two opposing sides of the framework, and a movable part displaceable in or on the fixed portion. Both parts have longitudinal scales readable against indexes, variations in the distance between the sides of the framework being reflected on the scale of the fixed part which has graduations twice as large as those on the scale of the movable part. Graduations of the scales are so arranged that when the movable part is adjusted with its scale showing against its index the same value as that read on the scale of the fixed portion against its index, the movable portion will always assume the same position in relation to the centerline between the sides of the framework.

Abstract: An apparatus is provided for bringing a holder for an indicating member, e.g. a mirror, scale etc. component of measuring means, into exact coaxiality with a rotatable body, such as a vehicle wheel or wheel shaft, for checking the axis position and direction of the body. The apparatus comprises three main parts, viz. (a) a base member attachable to the body to be checked, (b) an intermediate member displaceable on the base member, and (c) said holder, which is tiltably carried on the intermediate member. Displacement of the intermediate member on the base member supplemented by tilting of the holder on the intermediate member readily brings the axis of the holder with its indicating member into accurate alignment with the axis of the body.