Abstract: A portable comparator gage for cylinders having a self-supporting configuration with a high stiffness to weight ratio to minimize the contact force and therefore "spring open" of the gage when it is placed on a cylinder, and temperature compensation means to compensate for inaccuracies in the measurements of the relative deviation of the diameter of the cylinder resulting from variations in the temperature of the cylinder and gage from a nominal temperature.

Abstract: Apparatus for determining the dynamic complex hardness of resilient roll coverings including a portable housing for positioning directly on the resilient roll covering to be tested. The portable housing includes an adjustable probe coupled to force and displacement transducers. The adjustable probe is placed in contact with the resilient roll covering and vibrated. The transducers produce output signals in accordance with the force encountered by and displacement of the probe during displacement of the surface of the resilient roll covering. The output signals from the transducers are coupled to dynamic hardness and loss angle circuitry for providing direct measurements of the magnitude and phase angle of the dynamic complex hardness.

Abstract: A method of and associated apparatus for measuring cell volume in a gravure printing surface including the steps of positioning a probe including a pair of magnetic reaction devices over an engraved area with one device over an area with cells and the other device over an area without cells, providing a magnetic field to be sensed by the magnetic reaction devices, sensing the relative reduction in the strength of the magnetic field due to the presence of non-ferrous metal to provide a differential signal proportional to cell volume, and conditioning and recording the differential signal, as desired.