Abstract: An improved track assembly for TV, video and motion picture camera dollys. The inventive assembly includes first and second rail sections. The rail sections are connected by first and second spreaders. Each spreader is pivotally connected to the rails at each end of the spreader. The spreaders retain the first and second rails in a parallel offset relation in a first, deployed, position at which the first and second spreaders are disposed at a ninety degree angle relative to the first and second rails. In a particular embodiment, the first spreaders are coupled to one another by a set of fasteners which are connected to one spreader at one end and hooked onto another spreader at the other end. In the illustrative embodiment, the first and second rails include a male connector at a first end and a female connector at a second end, whereby each female connector on each rail is adapted to receive and retain a male connector from an abutting rail. Each of the rails has a uniform circular cross-sectional area.
Abstract: To provide inexpensively a connector constructed of a steel pipe and bearing a tie function of a ladder-type sleeper for railway tracks, in a connector constructed of a steel pipe 1 used in the ladder-type sleeper for railway tracks integrated with longitudinal beams made of concrete and the connectors constructed of steel pipes 1 by feeding concrete, both end portions of the connector constructed of the steel pipe 1 are flattened in the horizontal direction and a corrosion resistant coating 4 is coated at portions of the connector constructed of the steel pipe 1 exposed to the atmosphere.
April 25, 1997
Date of Patent:
March 30, 1999
Railway Technical Research Institute, Sumitomo Metal Industries, Ltd.
Abstract: A system for the laying of panel track that includes a plurality of panel tracks, a railroad car containing the panel tracks, and a panel track lifter positioned in the railroad car for lifting the panel tracks from the railroad car and for placing the panel tracks exterior of the railroad car. Each of the panel tracks includes a first rail, a second rail, a plurality of ties extending between and beneath each of the rails, and a plurality of gage rods affixed at various locations along the rails. A tension bar extends angularly between the first and second rails so as to create a curvature in the rails. The railroad car includes a material container having a generally flat floor extending between a pair of side walls. The material container has trucks suitable for rolling along a panel track. The material container is made up of a plurality of railroad cars having a flat floor extending throughout the plurality of railroad cars.
Abstract: A rail support adjusting and fastening device according to the present invention is used in such a state that tilting of each of the rails and the gage of a track are briefly adjusted in advance by connecting members (cross ties and the like) for connecting parallel rails to one another when the track is directly laid onto a concrete bed as a direct fastened track.