Abstract: The invention relates to an arrangement in signs of the kind which comprise a plurality of narrow, elongated prisms arranged in side-by-side relationship and the side faces of which together form a plurality of sign surfaces in different rotational positions of the prisms. The prisms are rotated by a drive shaft, common to all prisms, via a respective bevel gear drive. In accordance with the invention, each driving gear wheel of the bevel gear drive is journalled for rotation in a bearing which is carried by an individual bearing support, which is guided for individual movement axially along tracks which extend longitudinally along the one frame side-member of the sign, and which bearing supports can be locked in selected positions along the tracks.

Abstract: A sign formed from plural trilateral display screen assemblies, each assembly being rotatable to dispose one of three screen sides in a forward position, wherein all corresponding screen sides in such forward position collectively defining and displaying a picture.

Abstract: A dynamic display comprising a multiplicity of presentation units such as solid blocks (as shown), containers, stands or shelves arranged for rotation as at least two groups about respective parallel axes. At least one of the groups being contra rotatable with respect to the or at least one of the adjacent groups, and each of the presentation units being shaped and located to avoid interference with any of the other presentation units, with the groups being arranged in a straight line (as shown), cyclically or in a pattern, even though the paths of movement of the presentation units of adjacent ones of the groups overlap, when viewed in a direction parallel to said axes.

Abstract: A display device comprises a rotary carrier and a plurality of supports for respective display slats which supports are mounted on the carrier for rotation around the axis of rotation of the carrier and for rotation about respective axes, which are equiangularly spaced about the axis of rotation of the carrier. A slat is mounted on each support with its longitudinal center line coaxial with the axis of rotation of the support. The arrangement permits each slat to be turned to show both its faces and by movement of the slats around the axis of the carrier it permits alternative slats to be brought into the display surface.

Abstract: Game board devices to be used as bingo cards are provided with changeable numbering sequences capable of being more readily perceived and remembered by sight handicapped persons. Through switches on the game board card, chance selected numbers may be registered by each player and through parallel circuits produce an audible sound when a winning game is achieved upon closure of those switches corresponding to predetermined patterns on the game board.

Abstract: A display having a frame and prisms rotatably mounted therein, each of the prisms including adjacent longitudinally extending side surfaces so that each set of associated side surfaces of the prisms provides a display when rotated to a side by side position defining a permanently recurring sequence with the number of displays corresponding to the number of side surfaces on each prism. Each prism is provided with a pair of rotation axles disposed at opposite ends thereof. A drive motor and a transmission rotate the prisms synchronously, the drive motor being connected to one of the rotation axles. Gear discs are mounted on one rotation axle of each pair provided on the prisms with at least one belt mounted on the gear discs for rotating the gear discs and the prisms when the one rotation axle is driven by the drive motor, the belt being toothed for meshing with the gear discs.

Abstract: An advertisement display pillar for door usage having a rectangular stand in which a plurality of units are mounted vertically and in parallel. Each unit has a plurality of frames comprising parts of a total poster display surface facing the viewer. The frames permit being turned like the leaves of a book according to desired programs. By so turning the frames several complete posters can be sequentially displayed.

Abstract: Movable message sign apparatus having a single message display opening, and a number of back-lighted message display members mounted within the opening. Each message display member includes a translucent message member having a pair of message faces which form an open V configuration. The message members are attached to end members that are pivotally mounted, so that there is no need for an axle extending through a message display member. The message display members are oscillated in unison between message display positions which place either a first set or a second set of message faces in message display alignment with the opening. A source of back lighting is provided at a sufficient distance behind the message members to avoid streaking or other localized intense illumination. Each message member has flanges which enhance the rigidity of the member and which prevent direct viewing of the illumination source.