Abstract: The present invention is a modular electronic sign having a plurality of display units assembled on a mounting track and connected to a sign controller. Each display unit has a circuit board having a plurality of light emitting diodes arranged in a pattern thereon A microprocessor in each display unit is in communication with the sign controller and adjacent display units. Each display unit is environmentally sealed to avoid a separate enclosure for the modular sign. A plurality of standoffs are used to electrically connect the display units to power and communications conductors and mechanically connect the display units to the mounting track.

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 trailer mounted apparatus for use along roadways and convertible between a folded-transport position and an erected-operational position. When in the operating position, one signal unit is elevated on the side of the roadway, and another signal unit is elevated over a traffic lane at sufficient height so as to not pose a hazard to traffic. The apparatus has a fixed upright mast with a hinged mast extension which angles upwardly and laterally away from the top of the upright mast. A foldable arm with inner and outer arm portions is hinged to the top portion of the mast extension. When in the erected position alongside a roadway, the mast extension elevates the foldable arm which extends from the top portion of the mast extension across the trailer and out and over the traffic lane. One signal unit is attached to the outer end of the foldable arm and the other unit is attached to the mast extension.

Abstract: A highway marker manipulating apparatus comprising a pair of gripper wheels spaced apart to engage and apply pressure onto the side edges of the base flange of a highway marker. The wheels are spaced apart by a loading magazine between the wheels and directing the marker flanges into gripped engagement with the gripping faces of the opposing wheels; and a guide panel between the outer portions of the wheels to guide the flanges of the markers being retrieved off the pavement. A stripper guide is provided between the wheels for urging the flanges of the markers toward the outer periphery of the wheels as the flanges are also engaging the peripherally extending guide panels as to turn the markers and move the markers along the stripper bars which carry the markers to the upper periphery of the wheels. Stabilizing guides or runners are provided to be removably mounted at the lower portion of the gripper wheels to receive the flanges of dispensed markers therebeneath for stabilizing the markers on the pavement.

Abstract: A power operated linear actuator for remote operation of a machine. A cylinder frame containing a motor and a step-down gear train, a push-pull rod connected with a threaded nut movable along a high-pitch screw threaded shaft in the cylinder frame and an electromagnet clutch between the gear train and the screw shaft.