Abstract: The machine includes a reciprocating piston/hammer (10) assembly, which is constrained against rotation in the cylinder (8). This allows the cutting bit to apply concentrated action along a line, and thus is useful for cutting grooves. The cutting bars (40) are arranged in sequence to enter progressively deeper into the groove. Many bits are arranged side by side, for cutting parallel grooves simultaneously.

Abstract: A traffic marker and housing is disclosed, intended for installation in a road surface to provide delineation of traffic lanes. The marker comprises a platform installed flush with the road surface, with two bridges projecting upwardly from the platform, the bridges including ramp portions, and a reflector carried between the bridges in protected fashion. The platform extends beyond the ends of the bridges. The two bridges are aligned with the direction of traffic flow and offset from each other by an angle corresponding to the angle presented by an oncoming snowplow blade, so that the snowplow blade impacts both substantially simultaneously. The ramp portions are coplanar, and the plane of the ramp portions is offset by the same angle as the bridges. Apertures in the bridges provide an automatic cleaning feature, produced by the effect of passing vehicles. The bridges have angled outside edges to minimize inconvenience to traffic.

Abstract: A traffic delineator is capable of being depressed so that its upstanding light reflective surface is depressed into a plane coincident with, or subterranean with that of the surrounding pavement, when the delineator is located in a highway, or on any other over travelling vehicle surface. The depression of the light reflective surface of the retractable delineator is activated either by horizontal or vertical thrust. Specifically when a combination of both is experienced as in the case of the movement of vehicular traffic over the delineator or of grading instruments or equipment such as snow ploughs and the like which are used for cleaning the surface of the travelled highway during winter conditions. After the travelling vehicle has passed, the light reflecting surface, as a result of biasing action within the delineator, relocates the light reflective surface again into an elevation above the surface of the road.

Abstract: A reflector element which reflects different colored signals back towards a light source, depending on which side of a center plane the source is positioned, is disclosed. Reflective surfaces parallel to and equidistant from the imaginary center plane face each other. A third reflective surface is adjacent to, abuts, and is perpendicular to the other two reflective surfaces. Optionally, a fourth reflective surface is adjacent to, abuts, and is perpendicular to the other three reflective surfaces. Some or all of the reflective surfaces on one side of the center plane are tinted, and some or all of the reflective surfaces on the other side of the center plane may be differently tinted.

Abstract: A solar display kiosk particularly to a display kiosk that during day time conditions is illuminated by the sun. It provides, in its preferred embodiment, a closed cylindrical member placed in the vertical position with an open or a closed but light transmissive upper end, which acts as a receiver for solar or ambient light. A circumferential band at the top of the kiosk acts a shading member to place regions immediately beneath such band into shade either totally or in part (umbra and penumbra). Translucent display materials are mounted in the walls of the cylinder in the zones of umbra or penumbra. To the viewer they appear to be highly illuminated, the illumination coming from the solar light entering into the center of the cylinder.