Abstract: An arrangement for measuring the gap between two rolls or rollers includes a measuring body on which at least three support rollers that get into contact with a surface of one of the rolls or rollers are provided on one side to adjust the measuring body between the rolls or rollers. Two of the support rollers are located on either side of the gap to be measured, symmetrical with respect to the gap plane. At least two support rollers that get into contact with the surface of the second roll or roller, contacting the surface of the second roll or roller in contact points located symmetrical to the gap plane, are provided on the opposite side of the measuring body. At least two support rollers for the one roll or roller, that are arranged symmetrical to the gap plane, are synchronously movable towards the surface of the roll or roller and are pressable at the same.

Abstract: The strip is pulled in its longitudinal direction over two parallel supports, which extend transversely to and are spaced apart in said longitudinal direction. Said strip is subjected between said supports to magnetic forces which are approximately at right angles to the surface of said strip and are exerted by a plurality of solenoids, which are distributed across and clear of the strip and which comprise exciter windings fed with a predetermined alternating current, whereby a local deflection is produced in the strip adjacent to each of said solenoids, which deflections differ in a non-planar strip, in which the tensile stress differs across the strip. The voltage is sensed across each exciter winding during an interval of time shorter than one-half the period of the voltage and including a crossover of the alternating current. Values related to said local deflections are derived from the voltages across the exciter windings of said solenoids.