Abstract: Machine (10-110) to restore railway road beds with a continuous endless-conveyor riddle, the machine (10-110) comprising a frame (11) on trolleys (12-13), an excavator chain means (19), riddle means (25-125-47) with at least one continuous endless-conveyor riddle (25-126), discharge means (30), means (36-38) to distribute restoration material, and alignment grippers (39-40), in which machine (10-110) the continuous endless-conveyor riddle (25-126) sorts the material with its upper segment alone.

Abstract: A metalling re-distribution system on a machine to shape and re-distribute railway road beds is disclosed having movable screens with terminal ploughs and cooperating with chutes that cover the rails, including, in a central position between the chutes, a bladed drum which has its axis substantially horizontal and parallel to the railway line, powered and capable of two-directional motion. The machine to shape and re-distribute railway road beds which employs the metalling re-distribution system is also disclosed.

Abstract: Self-propelled machine (10) to dress and re-distribute railway road bed ballast, which is suitable for the operations of flattening and forming such road beds and comprises a wheeled (12-13) frame (11), a motor (14) and a cab (15) with windows, and also includes a forming unit (17), a unit (18) to transfer ballast and a brush unit (19) with rotary brush, the forming unit (17) having at least one rotary adjustable forming drum (23-24).

Abstract: Ballast dressing unit (17) on machines (10) which dress and re-distribute railway road bed ballast, such unit (17) comprising at least one rotary dressing drum (23-24).

Abstract: A railway ballast renewal machine for renewing a railway road bed within a tunnel is disclosed. The device has a scarifier to loosing the metalling, a work unit to grip and retain the alignment of the rails as well as remove the metalling from between the sleepers, a riddle to sort the metalling, and a device to spread the sorted metalling back on the railway bed. The metalling is removed from between the sleepers by a movable case which moves vertically between the sleepers.

Abstract: A tie lifting machine comprises a reciprocating tie removing member provided with retractable push fingers for removing the ties from the ballast and pushing them onto an upwardly inclined ramp to an intermediate position, a fork-like tie lifting member adapted to lift the ties from the intermediate position up to a belt conveyor running in the direction of travel of the machine, and a tie pusher adapted, when the tie lifting member is in its upper position, to transfer the ties carried by this member to the belt conveyor.

Abstract: A guidance system permits of guiding the railroad track positioning device of a track renewal and maintenance machine as the machine moves in the track working direction. To this end the curvature of a track section to be worked upon comprised in a chord of predetermined length is measured and as a function of this curvature the direction of a second chord is measured, one end of this second chord being coincident with the rear end of the section whereas its predetermined and constant length is so selected that its other end lies on the already renewed or maintained track section and shows the position of a point of this section before the renewal or maintenance works.

Abstract: A train for laying railroad track comprises cars for storing ties and a single working truck carrying a gantry and conveyor for transporting ties from the storage cars and laying them in front of the working truck. Roller clamps at opposite sides of the working truck move rails from the sides of the road bed and positioned them on the ties that have been laid. The working truck has a rear bogie running on the rails after they have been positioned and a front bogie supported by a carriage sliding or rolling on railless ties that have been laid on the road bed. The tie laying device is supported in overhanging relationship by the front end of the working truck together with a device for levelling and/or tamping the platform or ballast.

Abstract: A track tamping machine particularly a track tamping, levelling and lining machine is equipped with at least one tamping unit including a carrier which carries tamping tools. The tamping unit is vertically movable on a sub-frame by means of a hydraulic cylinder and is fastened thereto. The sub-frame itself is suspended from the chassis of the tamping machine pivotably like a pendulum. The sub-frame has two guide columns guiding the tool carrier through its vertical motion and, at its lower end guide rollers which revolve on the rail for the purpose of centering the tamping unit. A control cylinder is activated for the purpose of swinging the tamping unit in such a way that while the machine is uniformly moving forward at constant speed, the tamping tools can perform their tamping function at subsequent ties.

Abstract: There is described a mobile apparatus for laying of railway tracks. The apparatus includes a working tool carrying chassis capable of laying of new ties, a wagon for transporting and handling of material necessary for the track laying and a carrying bridge structure having one end carried by a rolling support and the other end comprising a rolling support and at least one supplementary retractable rolling support which is adapted to bear on the track bed. The carrying chassis is suspended above a working zone from the carrying bridge structure. The device is characterized in that the carrying bridge structure includes a wagon having only a single rolling support disposed at its end and provided with the aforementioned retractable supplementary rolling support and a longitudinally extending raised chassis which is pivoted at its other end to an overhanging bracket extending from the wagon which transports and handles the material.

Abstract: There is shown a mobile machine for the renewal of railroad tracks which includes a work tool carrying chassis to replace old ties by new ones. The machine comprises two wagons, one of which is arranged to transport stock and handle the materials necessary for the track replacement and one of the two wagons rolls and advances on the new reconstituted track. The work tool carrying chassis is interposed between rolling supports of the wagons in a work zone and is suspended from a connecting member on each of the two wagons. The geometrical disposition of the supports and of the joints between the two wagons is such that the longitudinal axis of the tool carrying chassis, in the plane of the track, is automatically tangential with the longitudinal axis of the track. One of the two wagons has two spaced apart rolling supports and is provided with an overhanging extension over the work zone in the form of a bracket terminating in a joint.