Abstract: A handle for the top of a blow-molded traffic delineator includes a bulbous lower portion, an curved intermediate portion, and an upper portion that forms a T-shaped handle. The upper portion has a hole therethrough to allow mounting of a warning light or other item. The intermediate portion has a curvature that gradually reduces the diameter of the handle moving from lower end to upper end, in a shape that easily accommodates the grasp of a human hand.

Abstract: A flat panel vertical traffic channelizer includes front and back generally rectangular panels connected to generally triangular end panels by curved corners. Each of the curved corners is formed as a portion of a cone, with a gradually increasing radius from top to bottom. The curved corners are preferably of a shape that would form a cone if the rectangular panels and triangular end panels were removed. Alternatively, the end panels may be reduced or omitted, so that the flat panels are connected by curved corners that have a radius that gradually increases from the top to the bottom of the channelizer.

Abstract: A D-shaped base fits tightly over a barrel to add ballast to the barrel. The base is perimeter weighted to increase resistance to tipping of the barrel. The interior circumference is designed to fit tightly on the barrel. The outer circumference includes a flat portion to resist rolling of the barrel if tipped over. As a result, if the barrel is tipped over, the base stays tightly fitted to the barrel, but if an automobile collides with the barrel, the base releases to reduce the possibility of damage to the automobile or barrel or base.

Abstract: A traffic delineator includes a cylinder and a base. The base has a hole therethrough to permit the cylinder to be inserted into the base and the base then holds the cylinder down. A grip is formed in the center section of the cylinder to increase ease of carrying the delineator. The cylinder may also include a handle and means for affixing traffic warning lights and flags. The base may include means for holding removable ballast. The cylinder is formed by blow molding.

Abstract: A traffic delineator includes a barrel and a base. Wheels are mounted to the delineator to permit rolling of the delineator. The barrel has a domed top for added strength. When removed from the base, the barrel may be stacked by nesting another barrel into the cavity of the first barrel. The barrel includes a handle. Traffic warning lights and flags may be affixed to the barrel. Removable ballast may be held by, contained in, or used on, the base.

Abstract: A fluid operable engine has a cylinder in which a piston slides up and down. The cylinder has a cylindrical wall and two end walls. The piston divides the cylinder into two chambers. The piston is hollow, has a cylindrical wall and two end walls, with a rigid tube extending from and through one end wall of the piston through an adjacent end wall of the cylinder so that the interior of the piston communicates with the exterior through the tube. The cylinder has an aperture in each end wall or in its cylindrical wall close to the end walls and the piston has an opening in each of its end walls. A closure member is provided for alternately closing the openings or the apertures as the piston reaches each end wall. The engine is operated either in a positive or negative manner, with fluid being charged into or sucked from the piston or the cylinder. The openings may be closed from within or without and the apertures may be closed from inside or outside. The closure member may be mechanically or fluid operable.

Abstract: A lamp includes a bulb that is held within an openable housing. When the lamp is turned on, the bulb gradually lights and the housing gradually opens to expose the bulb. When the lamp is turned off, the housing closes around and thereby conceals the bulb. Methods for opening the housing include a sliding piston system, a cam and lifter system and a gear and rack system. When the lamp is turned on or off, music may also be played or other such sounds generated.