A display apparatus having a grid structure comprised of slats with a uniform thickness and at least one frame to display a framed object. The frame selectively attaches to the grid structure in a manner that provides the appearance that the frame is part of the grid structure, thereby providing an ordered and aesthetically pleasing display.

A display element mounting arrangement provides a pair of display holders for frictionally-engaging and supporting an elongated display element at its opposite ends. The display holders are adapted to be mounted on and frictionally secured to a support member, such as a circuit board. Each display holder includes a display-engaging portion and a support member-engaging portion. The display-engaging portion includes four walls which define a chamber into which an end of the display is inserted. Friction tabs in the chamber aid in retainedly engaging the display. The support member-engaging portion includes a leg adapted to extend through and move in a slot which extends inward from an edge of the circuit board. A foot formed on the end of the leg is so spaced from the display-engaging portion as to provide frictional engagement between it and the circuit board.

A modular sign system, having modular units, each comprising a back frame having a thin backplate and a thin wall upstanding from the backplate and bounding a recess formed in front of the backplate; support posts outstanding from and integral with the backplate at spaced locations in the recess, and one of the following: i) a faceplate received over the recess and supported on and by the posts, the faceplate having a bounding edge which is closely bounded by the wall, ii) a faceplate received on and supported by the wall, substantially to close the recess, the faceplate adapted to carry sign information, and the backplate adapted to be carried adjacent a supporting surface. Multiple such units may be combined to form a sign system, and alphanumeric elements may be carried on the faceplate or faceplates.

A graphic panel system for providing a message spanning all or substantially all of a readerboard is provided. According to embodiments of the present invention, panel elements may be combined to form larger graphic images and textual messages. The individual panel elements may be single track height, even though they contain graphics or images that, when the panels are attached to a readerboard, extend for more than one row of the readerboard. Graphic panels having first color images are also provided.

A system for attaching a sign to a chain link fence of the type having post-supported interwoven wires producing a matrix of wire lengths extending between wire cross-over centers. The system comprises a sign, to the rear surface of which one or more attachment devices are secured. The attachment devices each comprise a pair of sections each having a face with circumscribing sides and interlocking means to secure the sections together along edges of their sides. The sections, when secured together over a cross-over center produce a hollow device having opposed faces and sides extending therebetween. The sides of the device have slots, when the device is so seated, located as to be seated over corresponding portions of the wire lengths extending outwardly from that center. A plurality of such devices supporting a sign, when secured to a chain link fence at predetermined locations, provide a simple and secure means for securing a sign to a chain link fence.