Abstract: Apparatus for information display comprising a plurality of parallel, rotatable rolls having axially movable indicia on the surface thereof and indicator rods positioned adjacent and perpendicular to the rolls and parallel to the common plane of the axes of the rolls.

Abstract: Apparatus for displaying changeable arrangements of indicia arranged in horizontal rows and vertical columns, comprises a support for the indicia having a surface that circulates in a horizontal direction and which may be a cylindrical drum or an endless belt. The indicia are arranged on this surface in horizontal rows that may be shifted lengthwise, and for this purpose may be attached to the surface magnetically or slide thereon in horizontal grooves. The columns are marked on the circulating surface, while the rows are identified by a vertically disposed rectangular reference plate that rotates about a vertical axis for utilization of both sides thereof, the rows on the reference plate and the rows on the circulating surface being in horizontal registry with each other.