Abstract

There is provided a bearing assembly by means of which movement, even minute movement, can be transmitted from an object being measured to a measuring apparatus. The assembly comprises a rotatable shaft on which are mounted two inner rings and two outer rings which are displaceable relative to each other. Arranged around both sets of rings is an externally threaded sleeve. Located between respective outer and inner rings are pressure-mediating means. The rings are held between two end plates which cooperate with screw means in manner such as to change the position of the pressure-mediating means in relation to the rotatable shaft.The shaft is provided with means for attaching a measuring arm of a measuring apparatus incorporating a measurement indicator, so that movement of the arm is transmitted through the assembly to the indicator.The advantage afforded by such an assembly is that, when used in conjunction with the measuring apparatus, the movement of the arm is recorded accurately and positively by the measuring instrument.