Abstract: A method and apparatus for creating the appearance of on and off flashes of light and of moving to attract the attention of an observer is provided. A moveable support is provided, rotatable about an axis with first and second reflective materials thereon at horizontally and vertically spaced locations thereon on opposite sides of the axis of rotation. The reflective material is rotated to bring the reflective materials into the line of sight of an observer on opposite sides of the rotational axis and then moving the reflective material from the line of sight of the observer.

Abstract: An erectable and collapsible warning signal reflector assembly includes a pair of crossed arms that are pivotally connected to one another at their crossing point and are further attached to a vertical post stand at the same point. An elongated hollow box is used as a stand. The bottom of the vertical post is positioned into an opening in a top lid cover of the elongated box stand. When the crossed arms and post are rotated along the same plane, the entire assembly can be fit into the elongated box for storage purposes. Electrically powered lights are located on at least one side of each of the arms. The lights can be powered by a battery and switch inside each of the arms. Alternatively, the lights can be powered by an adapter plug that can be inserted into a conventional cigarette lighter. Alternatively, the lights can be reflector covers.

Abstract: Disclosed herein is a street address display designed to provide easier identification of property. The street address display is especially effective at night. The street address display includes a housing with transparent viewing faces, anchoring platforms attached to the housing, figures, and a background used as a mounting surface for the figures. The figures and the background are of contrasting coloration so that the figures can be seen by day as well as by night. The street address display is designed to be mounted directly to a mounting surface, such as a vehicle entranceway, using an anchoring means. The street address display is mounted on the mounting surface proximate to a roadway so that the street address display can be easily seen by oncoming traffic. The placement of the street address display near an adjacent roadway, along with the low profile of the street address display, allows for the street address display to be readily visible in an automobile's low beam headlights.

Abstract: A mobile sign with a solar panel for warning motorists of highway problems. The mobile sign comprises a wheeled vehicle, an electrically powered sign panel mounted on the wheeled vehicle, a chargeable battery for powering the sign panel, and a solar panel for charging the battery. The solar panel is rotatable and tiltable relative to the wheeled vehicle. The sign panel is independently rotatable relative to the wheeled vehicle. The sign panel has a low-glare, high-contrast display that also improves the lifetime of the display's electronic or mechanical components by reducing heating of the display due to the sun.

Abstract: A regulatory flexible highway sign of rectangular configuration that may be rolled up for transport and for storage is disclosed. The rolled up "sign" package and a foldable sign stand for securing the sign in a message display position are disclosed. When the flexible highway sign is arranged in a display position, it is vertically supported by means of a pair of angularly oriented, long flexible members by a holding assembly constructed and designed to permit pivotal movement of the two flexible members between an angularly oriented sign displaying position and a side by side disassembled position whereby the pivot for the flexible members does not bear a load. The sign per se is maintained in a display position by frame members secured thereto including a pair of longitudinal members pivotably secured to the sign so that when longitudinally aligned secure the flexible sign in a display position. This is achieved by means of a sliding C-clamp member.

Abstract: An apparatus for covering a face of a traffic light with a warning sign as a result of a power failure to the traffic light. A first member is rotatably mounted to one side of the traffic light and a second member is rotatably mounted to the other side of the traffic light. A first electromagnet and a second electromagnet are provided for securing the first and second members in a first position away from the face of the traffic light. A first coil spring and a second coil spring are mounted respectively to the members and to the sides of the traffic light and cause the members to rotate to a second position covering the face of the traffic light upon release of the members by the electromagnets. An electric motor is also provided and is connected to a pair of linkage mechanisms to rewind the first and second members to their first position upon resumption of electrical power to the traffic light.

Abstract: A traffic control signal particularly adapted for alternate one-way traffic situations such as are frequently encountered in highway construction zones whereby `STOP` AND "SLOW" sign panels can be alternately displayed with suitable control mechanism which produces a combination rotational and axial displacement of a signal panel whereby one traffic control message can be superimposed upon another for displaying either a "STOP" message or a "SLOW" for the vehicular traffic.

Abstract: A mobile traffic warning sign including a heavy flat base, a conical spring fastened to the base at the top by holding-down plates and screws, and a collapsible conical covering with reflectors covered on the conical spring, and a case for receiving the warning traffic warning sign when the conical covering and the conical spring are collapsed and received in a circular recess on the base.

Abstract: A sign support base comprising a staff base to which a plurality of plates are secured, the plates having pivotal legs secured thereto, the pivot means comprising a resilient mechanism for biasing the leg toward the plate and engaging means comprising a moveable pin resiliently biased outwardly from the leg for engaging in apertures in the plate, the legs, plates, pivot means and engaging means being so constructed that movement of the distal end of the leg disengages the resiliently biased pin from the apertures is disclosed.

Abstract: A self-righting warning marker includes a base having a warning sign attached thereto and projecting upwardly therefrom. The warning sign is preferably formed of a polymer which is rigid yet resilient and flexible, to prevent breakage upon contact from a vehicle or the like. The base of the marker has a pivot surface extending between a rearward face and a bottom surface so that the marker will roll along the pivot surface from an upright orientation to a horizontal orientation if contacted by a vehicle. A ballast weight within the base is located such that the center of gravity of the marker is located forwardly of the pivot surface to thereby cause the marker to be self-righting. In a preferred embodiment of the invention, an illuminator is mounted on the marker, with a lens attached along an upper edge of the warning sign and a bundle of fiber optic cables extending through the panel of the warning sign to a power source in the base which includes a light and a battery.

Abstract: A barrier member adapted for easy mounting on and dismounting from a pair of conical pylon road members comprises an elongated barrier body, usually of thin sheet metal, providing a vertical barrier surface with a pylon-engaging member at each end. Each pylon-engaging member has an aperture of such diameter that it can be mounted on the pylon upper end with the end protruding through the aperture so that the barrier member is retained against transverse movement and is maintained at a predetermined distance above the road surface. Preferably the pylon-engaging member is formed from round cross section rod to provide wedging tangential retaining contact between itself and the softer plastics material of the pylon outer wall upon pressing the member downward on the pylon. The barrier body has a wider portion extending vertically and a narrower portion extending at an angle to the wider portion to increase the transverse rigidity, the pylon-engaging members being attached at their junction.

Abstract: A plastic barricade is formed from identical panels placed back to back and hinged together. Each panel includes a handle at the top, vertical legs with reinforcing ribs, and horizontal cross-members. The bottom most horizontal cross-member includes a stacking lug that may be inserted into the handle to prevent a stack of barricades from tipping over. The barricade may also be designed to be compatible with existing barricades.

Abstract: A road sign for clearly presenting a customizable message to a driver under direct and back lighting conditions, comprising a background board with an array of mounting holes. Message elements and background elements are placed into the appropriate holes to form a mosaic message. Each mosaic message has a retroreflective portion surrounded by a translucent border. When the sign is illuminated by direct lighting, such as a driver's own headlights, the retroreflective portion will reflect much of the light so that the message will be clearly visible to the driver. When the sign is illuminated by strong back lighting, such as a low sun or oncoming headlights, the translucent border will glow brightly so that the message will be clearly seen by the driver as an outline of the message. The message elements can be rearranged to form a variety of different possible messages and graphical designs.

Abstract: A retro-reflective sign is provided having a front face member attached to a back member. The face member has a plurality of cube corners disposed along its back surface. The sign can be of any shape or color and provides superior light reflection at night as compared to conventional signs. Thus, the sign can be easily seen while driving at night. In an alternative embodiment, the cube corners are disposed along the inner surface of the back member. The front face member or the entire sign can be coated with a silicone material to provide added protection to the sign from scratching and vandalism.

Abstract: A bendable marker for use in areas where the marker is required to be flexible is provided with a base and a marker post which are joined together by a flexible sleeve. The flexible sleeve has a plurality of evenly spaced ribs which extend longitudinally along the sleeve from an upper end to a lower end. The ribs are evenly spaced apart with a groove being formed between each of the ribs. The ribs protrude from both the inner and outer surfaces of the flexible sleeve. If the marker post is struck, the flexible sleeve allows the marker post to bend relative to the base. The ribs strengthen and enhance the resiliency of the sleeve.

Abstract: A shield device or assembly for a bridge-mounted highway sign has upper and side panels forming a frame surrounding and projecting outwardly from the upper and side edges of the sign, so as to shield the front face of the sign from view from the bridge. The panels are secured to the sign by upper and side mounting devices, which may be arranged so that the panels flare outwardly at angles greater than 90.degree. to the front face of the sign. Corner pieces fill in the corners between the panels at the upper corners of the sign.

Abstract: A flexible display banner functions to display visually perceived messages, of a changing nature, particularly a light emitting diode message display signboard and messages of an unchanging nature whereas the said messages are a physical part of said banner.The flexible display banner includes a containment pouch having four opaque panels and one transparent panel which houses said message signboard, which projects a plurality of messages which can be readily changed including many by remote control. The containment pouch also houses an alarm, particularly one sounding like a fire alarm, which will be activated by unauthorized tampering.

Abstract: An articulated and automatic spring-back post foot (3) for a post (1) for road signs, signal lights and smaller street lights or the like. The post foot comprises a lower or exterior section (11) adapted for attachment in the ground or to a bridge element or the like, and an upper or internal section (4) having an attachment means for the post (1) and being connected for articulated, spring-back movement to said First section (11). The lower or exterior section (11) consists of a sleeve-like element of metal having at the upper edge thereof an inwardly facing annular flange (12). The upper or internal section (4) is provided at the lower end thereof with a central indented section (8) which is provided on the exterior jacket face thereof with an encircling body (9) of elastic rubber material having an outer diameter which is adaptable by press-fitting to the internal diameter of the flange (12).

Abstract: This invention relates to a mount for redressably mounting a sign thereupon comprising a bracket member fixedly attached to an end of an elongate support member having essentially an angled cross section. The bracket member is mounted to a structure such as a bridge with the support member disposed generally horizontal relative to the ground such that the vertex is directed downward to display essentially a V shape. A tubular rotatable member having a square cross section is coaxially and rotatably mounted about the support member with a weighted pendulum swingably depending downwardly from the bottom wall of the rotatable member and with a sign support member extending upwardly from the top wall thereof to which a sign is fixedly attached. The support member provides two pivot points upon which the rotatable member rests with the sign in an upright position to substantially minimize swaying of the sign back and forth in the wind.

Abstract: A street identification sign and supporting post assembly designed to be essentially theftproof and vandalproof. The sign boards are preferably made of cast aluminum and contain an integrally cast elongated rod that is also cast into the open top of the supporting post. The various components of the assembly are all integrally joined together with cast metal into a unitary street sign structure or assembly. Also disclosed is a method for producing the unitary structure or assembly using aluminum castings.

Abstract: A street direction indicator for displaying both the name of the street and direction thereof includes a surface having inscribed thereon the name of the street and one or more stripes, said stripes being oriented parallel to the direction of the street indicated on the surface,

Abstract: A support structure for a road warning sign comprising a pair of elongated hinged crossbar members having support leg members pivotally connected thereto at their ends, said support leg members being adapted to be swung outwardly and downwardly from a folded location along the crossbar members to a ground engaging position whereby said hingedly connected crossbar members close to secure therebetween a sheet material road sign.

Abstract: An adjustable and recoverable vertical assembly comprised of a post containing a load cell, mounted to a base, capable of recovering its original vertical and horizontal orientation after an impact with a moving object, with the additional capability of accepting attachments of various types and sizes. A low profile signage panel so designed to provide a surface with no protruding edges to be snagged during a vehicle collision, that may be attached to the vertical assembly. Attachments capable of being mounted on top of the vertical assembly that enable it to be utilized as a sign stanchion or a base for objects requiring a horizontal mounting surface.

Abstract: A visual message indicating barricade is presented having a support means adapted to hold the barricade in a relatively upright position, at least one body affixed to said support by a securing means, at least one selectively movable member connected to the body, and at least one visually discernible message presented corresponding to each of the members, wherein the members can be selectively positioned in either a concealing or a revealing position with respect to the visual message corresponding thereto.

Abstract: A release mechanism for a locking, pivotable leg for an assembly to allow an individual to use his foot to disengage the locking element which locks the pivotable leg into its operative position in which a plurality of such legs engage a supporting surface. The release mechanism includes a release pin having an enlarged head and transmission means to transmit movement of the release pin to the locking element moving it from its operative locking position. Where the locking element is of a type including a locking pin which is biased into a locking pin hole in a base bracket by biasing means such as a leaf spring, the transmission means of the present invention includes a release pin spring shoulder, a locking pin spring groove and a pin slot in the leaf spring disposed to engage these two components.

Abstract: A combat training, targeting, and signaling device generally rectangular and planar in shape and containing peripheral grommets allowing for the suspension of the device between two roughly vertical objects, one flat planar surface being a larger piece of brightly colored flexible fabric, to which is attached a smaller piece of a second type of flexible infrared reflective material. The second material is of a sharply contrasting color to its brightly colored background, is of a predetermined shape, and is a material which, without an independent source of power, reflects infrared wavelengths when observed through military sighting devices.

Abstract: A road sign for clearly presenting an informational legend to a viewer in front of the sign under direct and back lighting conditions, comprising an aluminum background sheet (10) having a cutout (12) in the shape of the legend (11). A retroreflective portion (14) is sized and shaped such that when the retroreflective portion is placed into the cutout, a uniform gap is left between the portion and the cutout. A translucent sheet (13) is mounted behind the background sheet and the retroreflective portion such that a translucent border (15) is visible from in front of the sign. When the sign is illuminated by direct lighting such as a driver's own headlights, the retroreflective portion will reflect much of the light such that the legend will be clearly visible to the driver. When the sign is illuminated by strong back lighting such as a low sun or oncoming headlights, the translucent border of the legend will glow brightly such that the message will be clearly seen by the driver as an outline of the legend.

Abstract: A self-stable, light weight, foldable and easily assembled road signaling device for disabled vehicle warning or the temporary channeling of traffic, comprising of a flexible warning panel and base. The polygonal panel and complimentary base are formed from the cut lines on an unitary flat sheet body. When the warning panel is folded upright, the base is formed from the remaining unit. Alternatively, the signaling device comprises of a flexible panel affixed to a flat light weight base. The panel is coated with fluorescent or reflective material. Shaped to reduce air drag and constructed of flexible material, in wind or turbulence, the whole warning panel will sway about the stationary base.

Abstract: A sight barrier or screen is disclosed herein for temporarily obstructing oncoming motorists' view from accident scenes which includes an elongated screen or shield having a stowed position deployable into an operative position by inflation of tubular or conduit members. A main or base conduit is included having outwardly projected leg members for supporting the screen or shield in the operative position and further having upwardly projecting stanchions in spaced-apart relationship supporting a plurality of sight barriers therebetween. A source of pressurized gas is operably connected to the main base conduit for rapid deployment of the shield into its operative position and ground engaging or retention devices are included for holding the shield in place at the accident site.

Abstract: A movable stand made of a base member having a flat bottom surface adapted to rest on the ground and with a pair of rotatable wheels mounted under the base member on an axle adjacent and within the periphery of the base member. The wheels are mounted under the base member at such a level so that their periphery does not touch the ground when the base member rests on its bottom surface. The base member is provided with a connecting means to receive a stick handle above and substantially midway between the wheels. The base member is accordingly adapted to be tilted by the stick handle for bringing the wheels in contact with the ground and for moving the base member from one location to another in its tilted position. The base member is provided on its top surface with a selection of perforations and stumps for upstandingly receiving a post carrying a pictogram.

Abstract: A display device hooked to a signboard comprises a placard and a connecting member fixed to the signboard for hooking the placard which is provided with a L-shaped slot extending from the upper edge of the placard. The connecting member is characterized by a forwardly projecting stem adjacent one edge and an abutment member forwardly projecting from the signboard and located below the stem and further remote from the lateral edge which is adjacent the stem. The L-shape slot in the placard is adapted to engage the stem while the placard is in a tilted position and the abutment member is adapted to abut on the above-mentioned edge when the placard is pivoted in a vertical position.

Abstract: A portable highway barrier constructed of light weight material has an interior cavity which can be filled with a fluid ballast once it has been transported to a utilization site. The barrier has a box-like configuration defined by vertically-oriented side and end walls, the bottom portion of which is constructed to provide vertically-oriented slots each of which may function to support the lower edge of a vertically-oriented highway sign. The upwardly extending walls of a shallow well formed in the top of the barrier have apertures therein for facilitating attachment to the barrier of highway signs and/or other signalling or control devices such as warning lights. The barrier construction provides for attachment of connecting elements to its end walls so as to enable interconstruction of a plurality of barriers in end to end relationship for traffic channelization.

Abstract: A folding warning marker includes three tubular stays each having first upper ends joined together by torsional coil springs. A flexible, brightly colored and reflective fabric cover is received over the stays. The torsional coil springs bias each adjacent pair of the three stays apart, forming isosceles triangles such that the fabric cover forms a pyramidal configuration. An apex region of the flexible cover is reinforced to withstand the stress induced by the torsional coil springs. Lower ends of each of the tubular stays are received in respective pockets formed on an interior surface adjacent the lower peripheral edge of the fabric cover. The stays may be manually forced into a parallel relation to form a compact closed position of the warning marker for storage and transportation purposes. The warning marker may be retained in the closed position by a securing strap or a storage tube.

Abstract: An improved apparatus for attaching a flexible marker shaft to a roadway. The flexible lower part of the marker shaft slides over a mandrel, and into a maker shaft cavity. Locking wedges are positioned in the cavity to surround and support the flexible marker support shaft in the cavity. A locking pin passes through a locking pin hole and locks the wedges and the marker shaft into the marker shaft cavity.

Abstract: A road sign includes: a rotor disk rotatably mounted on a frame having a retroreflective sheet formed on a first surface of the rotor disk capable of reflecting any incident light projecting onto the retroreflective sheet for forming a bright surface of said disk, and a light-absorptive surface formed on a second surface of the rotor disk opposite to the first surface capable of absorbing incoming lights projecting onto the light-absorptive surface for forming a dark surface of the disk, whereby upon a blowing of wind on the rotor disk, the disk will be rotated to subsequently orient the first bright surface frontwardly and then orient the second dark surface frontwardly, thereby causing a flashing operation for serving as an effective road sign.

Abstract: The signaling device (20) has a signaling body (21) and a holding device (22). The signaling body (21) is designed as a cornet-like hollow body which has four wall regions (24; 27) adjoining one another in the circumferential direction, of which two diametrically opposite wall regions (24) form the wide sides of the signaling body (21) and of which the other two likewise diametrically opposite wall regions (27) form the narrow sides of the signaling body (21). The wall regions (27) on the narrow side have the form of a conical shell. The wall regions (24) on the wide side are preferably flat. Between the signaling body (21) and the holding device (22) there is a coupling device (23). The wall regions (27) on the narrow side have above the foot (28) of the signaling body (21) in each case a recess (33; 34), which has a certain height and which extends in the circumferential direction up to the transitional point with the neighboring wall region (24) on the wide side.

Abstract: A collapsible highway sign assembly includes a cross brace assembly having first and second semi-flexible arms pivoted together for pivoting between storage and display positions. Each arm has first and second ends with four fastener stops, each being adjacent one arm end. A sign sheet of a flexible material with opposing message-bearing and attachment faces has four fasteners secured to the attachment face so each slidably receives an arm end and engages the fastener stop adjacent the arm end when the cross brace assembly is in the display position. A pair of flags are pivoted to a first arm upper end with a friction fit. For storage, a flag storage cavity is pivoted between the first and second arms. An anti-kiting device is secured to the sign sheet attachment face and surrounds an arm to resist kiting and maintain the sign assembly in a safe position visible to oncoming motorists. Methods of deploying and preparing the sign assembly for storage are provided.

Abstract: The traffic safety device of the invention incorporates a see-through, vinyl or rubber-type bag, inflatable to a height of some 4-5 feet and to a width to approximate that of a typical lane of traffic. The inside rear surface of the bag is provided with a reflective material to reflect headlight illumination through any one of a number of highway warning signs that may be draped across the outside front surface of the bag. A pair of elastic straps are stretched to encircle the bag as it is inflated, and automatically pull and guide the bag back into a storage box for the device as the bag is deflated and the straps return to their original lengths.

Abstract: Signs comprising an outer layer having indicia thereon and a thermal reservoir behind the outer layer. The thermal reservoir contains at least one phase change material that, during periods of falling ambient temperature, yields a latent heat of transition thereby tending to maintain the temperature of the outer layer above what it would otherwise have been. As a result of such higher temperature, the outer layer of the sign is more resistant to formation of dew or frost thereon and retains a greater degree of legibility.

Abstract: A quick set-up sign stand comprising first and second leg structures each having a non-circular circumferential locking central portion and ground-engaging portions, the leg structures pivotally mounted to face plates, the face plates secured in spaced apart relationship for receiving the sign and a leg-locking latch secured in moveable relationship to the plates for selectively locking the legs in a support position is disclosed.

Abstract: A sign support comprising a pair of pivot leg assemblies secured along the bottom on the respective sides of the sign, a receptor for a sign which removably locks the sign to the support and a flag staff support for securement to the edge of the sign are disclosed.

Abstract: Apparatus including an L-shaped handle mounting a battery pack at one end thereof and a selectively actuated flashing sign at an upper end thereof wherein the flashing sign includes a border of a first coloration contrasting to a central panel of a second coloration each coloration formed of a reflective material wherein the handle of the organization includes a reflective strip of a first coloration including a handle and a switch member. The organization may further include a joint member to permit inter-folding of the organization for ease of transport and storage.

Abstract: A portable ground-supported automobile traffic control device including an upright, double-sided human-shaped figure which is so constructed and configured as to simulate a traffic control officer, and having one arm and hand in a raised position and carrying thereon, back-to-back electrical stop-and-go traffic light signal units. The traffic light signal units face in opposite directions, and are powered by storage batteries in a base that is provided for the figure. An automatic controller is connected to the signal units and to the batteries, to effect synchronized stop, stop-and-go, or other displays on the traffic light signal units, thereby to provide visual directions to motorists for the orderly control of two-way traffic in the vicinity of the figure.

Abstract: There is provided a floor sign having a ratchet positionable hinge and replaceable signage. The hinge operates by frictionally engaging one side of the hinge integral with one panel and engaging the opposite side of the hinge, which is integral with the other panel, by means of a ratchet mechanism. This mechanism is arranged to be slideably disengaged by shifting the axial member of the hinge. Selected signage is attachable by magnetic adhesive, or hook/loop (Velcro) methods.

Abstract: A construction or emergency sign with a changeable message on its front surface. The sign has a diamond shape or a square shape and one or more flaps are secured along the central diagonal of the sign. The flaps are adapted to be releasably fastened to either of two opposite corners of the sign and have messages on both sides. When the flaps are secured in one corner, a first message is presented and when the flaps are secured in the other corner, a second message is presented. A pair of cross-braces hold the sign in a taut planar configuration. The sign is also adapted to be collapsed into a small, compact package for transport and storage. One embodiment of the sign has two or more flaps thus allowing three or more different messages to be presented. Another embodiment has an additional cross-brace allowing the sign to be used to present either diamond or square-shaped messages.

Abstract: A flexible highway safety sign capable of being rolled up for storage and portability and mounting a high-way flag. The safety sign is useful with flexible frame members that allow the mounted sign to bend in response to winds and wind gusts without tipping over and taking a set. The frame members include a clamping assembly for mounting a plurality of flag arms with the highway sign. The clamping assembly permits a pair of flag arms to be pivotally secured thereto between a flat displaying position and a storage position. The storage position allows the flag arms to assume a side-by-side relationship with the folded frame members to the sign to permit the flexible sign to be wreapped around the members for storage and/or transport.

Abstract: A normally upstanding road marker includes a cone extending from a special base formed of an elastomeric material to induce a self righting movement to return the road marker to an upstanding position subsequent to it having been tipped over. The base includes a peripheral edge of undulating configuration defining a plurality of radially extending flaps and an annular depression for focusing bending of the base along a line radially inwardly of at least some of the flaps.

Abstract: A foldable, warning triangle includes illuminating and audible alerting indicators to warn oncomers of vehicular accidents and other danger conditions. Flashing lights may be powered from self-contained batteries or from an external source such as an automobile battery and the flashing rate may be set by an internal timing circuit or may be derived from the collision-avoidance lamp of an automobile.

Abstract: An invertible, foldable sign formed of an integral blank synthetic resin material permits repeated folding and reversibility for display of multiple messages. The sign has opposite side panels joined by an integral resilient hinge, which panels are latchable into display configuration by integral tabs. The sign is self-latching for shipping or storage.

Abstract: A display structure is disclosed comprising rectangular panels each having at its upper edge a cross member (7) providing an upwardly open channel (80) which receives a central formation (68) of a retaining member (54) which provides, at its upper end, on opposite sides, respective downwardly open channels (60). In a lowered position of the retaining member, the outer wall (62) of each channel (60) extends on the outer side of the member (7) and can serve to retain the upper edge of a respective display card fitted in the panel. The releasing member can be raised, then tilted, while being held captive on the member (7) by an enlarged lower end part (76, 78) of the central formation which cannot pass between flanges (82) on member (7), to a position to one side of the respective side face of member (7) to allow vertical insertion or removal of the display card or the like.