Abstract: A method of working a main track and a laterally adjacent track in a track switch section in tandem comprises the steps of intermittently moving a track leveling, lining and tamping machine with lifting tools and vertically and laterally adjustable, vibratory tamping tools along a main track, lifting the main track under the control of a reference system with the lifting tools to a desired level at respective longer ties connecting the tracks, and tamping ballast under the lifted ties with the tamping tools. A switch leveling and tamping machine with lifting tools is moved along the laterally adjacent track and, in the same operating stage, at least one of the rails of the laterally adjacent track is lifted with the lifting tools of the switch leveling and tamping machine, and ballast is tamped under at least a portion of the longer ties at the laterally adjacent track. The ballast tamping is completed under any not previously tamped ties or portions of the longer ties in a subsequent operating stage.

Abstract: A continuously advancing machine for track leveling, lining and tamping comprises a main frame, a single undercarriage supporting the main frame and the main frame having a portion projecting in the track direction from the single undercarriage, a drive connected to the single undercarriage for continuously advancing the main frame in an operating direction, a brake connected to the single undercarriage for stopping the advancing main frame, and an operator's cab, a control arrangement and a power plant mounted on the continuously advancing main frame.

Abstract: A mobile switch leveling, lining and tamping machine comprises a vertically and laterally adjustable leveling and lining tool carrier frame linked to the machine frame, a pair of flanged wheels supporting the carrier frame on a main track for mobility therealong, each flanged wheel engaging a respective rail and serving as a track lining tool, a respective power-operated, vertically and transversely adjustable track lifting tool mounted on the carrier frame for gripping each rail at one side thereof, a leveling and lining reference system including a main track position sensing device, the leveling and lining reference system controlling actuation of the track lifting and lining drives in response to the main track position sensed by the device, a vertically adjustable auxiliary device mounted on the machine frame for lifting a laterally adjacent track section, a power-actuated drive for laterally displacing the auxiliary device, and a measuring carriage associated with the machine and running on the laterall

Abstract: A machine for laterally displacing a track comprises at least one vertically adjustable tamping head having reciprocable vibratory tools for tamping ballast under the ties; a compact operating unit comprising a common carrier frame, a vertically and laterally adjustable device for lifting and laterally displacing the track mounted on the common carrier frame and including rail engaging roller tools, and a vertically and longitudinally adjustable device for orienting obliquely positioned ties to assume an orientation extending substantially perpendicularly to the track in the common plane, the tie orienting device being mounted on the common carrier frame and including a tie engaging tool; and power-actuated drives linking the carrier frame of the operating unit to the machine frame for vertically and laterally adjusting the carrier frame.

Abstract: A mobile track working machine comprises a machine frame and an apparatus for lifting and laterally moving the track in a switch section, which apparatus comprises a vertically and laterally movable tool carrier frame, power-actuated drives linking the tool carrier frame to the machine frame for vertically and laterally moving the tool carrier frame with respect to the machine frame, a pair of flanged wheels supporting the tool carrier frame for mobility on the track, a respective one of the flanged wheels being associated with each track rail and serving as track lining element, and a respective rail gripping device mounted on the tool carrier frame for engagement with the field side of the associated rail and including a first rail gripping hook transversely and vertically adjustable for engagement with the associated rail and a rail gripping member of a different type for subtending the rail head at the field side of the associated rail.

Abstract: A continuous action track maintenance or rehabilitation machine comprises a first machine frame, a carrier frame arranged between the undercarriages supporting the first machine frame on the track, ballast tamping and track lifting and lining units vertically adjustably mounted on the carrier frame, and a drive linking the carrier frame to the first machine frame for longitudinally displacing the carrier frame with respect thereto. A second machine frame is linked to the rear end of the first machine frame, and a plow arrangement is vertically adjustably mounted on the second machine frame between the undercarriages thereof, the plow arrangement comprising a drive connecting the plow arrangement to the second machine frame for vertically adjusting the plow arrangement with respect thereto, a center plow for plowing ballast between the rails of the track, shoulder plows for plowing ballast laterally adjacent each one of the rails, and a drive for operating each one of the plows.

Abstract: A mobile apparatus for sequentially exchanging selected consecutive groups of old ties in an existing railroad track for groups of new ties while retaining groups of old ties therebetween to support the mobile apparatus on the track, comprises at least one bridge-like work vehicle having a frame defining an upwardly recessed portion between respective ends thereof, swivel trucks supporting the work vehicle frame ends on the railroad track, and a drive for the continuous advancement of the work vehicle on the railroad track in an operating direction. A succession of different individual devices are longitudinally displaceably mounted in the recessed frame portion of a respective work vehicle and are operative to effectuate different sequential operations for exchanging the selected old ties for the new ties, the tie exchanging devices including at least one tie pulling and inserting device.

Abstract: A mobile machine for leveling, lining and tamping a track switch comprises a machine frame and a track lifting and lining tool carrier frame mounting a pair of flanged lining rollers arranged for supporting the carrier frame on the rails of the main track and for lining engagement with the main track rails, lifting tools including a respective vertically and laterally adjustable clamping element arranged for clamping engagement with the main track rails, and lifting and lining power drives connecting the carrier frame to the machine frame for vertically and laterally adjusting the carrier frame with respect to the machine frame. The machine has a branch track lifting device comprising a laterally adjustable carrier frame, flanged rollers arranged for supporting the carrier frame on one of the rails of the branch track, and a laterally adjustable clamping element including at least one lifting roller arranged on the carrier frame for clamping engagement with the one branch track rail.

Abstract: A mobile apparatus for sequentially exchanging selected consecutive groups of old ties in an existing railroad track for groups of new ties while retaining groups of old ties therebetween to support the mobile apparatus on the track, which comprises a continuously advancing bridge-like work vehicle having a machine frame defining an upwardly recessed portion between respective ends thereof and a respective swivel truck supporting each machine frame end. A continuous guide track is mounted atop the work vehicle and a power-driven tie transporting crane is mounted for mobility on the guide track.

Abstract: A track leveling and ballast tamping machine comprises a standard vehicle capable of being coupled to a train, two undercarriages supporting the frame for movement in an operating direction along a track and a drive for moving the frame along the track. A ballast tamping unit is connected to the frame between the undercarriages and a track lifting unit is connected to the frame between the undercarriages ahead of the ballast tamping unit in the operating direction, a track leveling reference system controlling the lifting of the track by the track lifting unit. A ballast receiving and storage container is mounted on the frame ahead of the ballast tamping and track lifting units in a forward portion thereof, the container having adjustable outlet ports for distributing ballast in respective ones of the cribs, and a ballast conveyor is arranged on the frame for conveying ballast to the ballast receiving and storage container in the forward portion of the frame, in the operating direction.

Abstract: A mobile installation for cleaning the ballast supporting a track and subsequently leveling the track and tamping ballast under the ties of the leveled track comprises a ballast cleaning machine movable in an operating direction along the track and a track leveling, lining and tamping machine following the ballast cleaning machine in the operating direction, the track leveling, lining and tamping machine.

Abstract: In a mobile track working machine comprising a frame mounted for mobility on the track: a mechanism for bending the track rail section ends comprises a carrier frame vertically adjustably mounted on the machine frame above a respective track rail and having respective end regions spaced from each other in the direction of the track rail, a respective hydraulically operable and vertically adjustable thrust element mounted in a respective end region of the carrier frame for engagement with the running face of the track rail, an intermediate carrier transversely movably mounted on the carrier frame, and a rail lifting hook device supported centrally between the thrust elements on the intermediate carrier for engagement with the track rail, the hook device including two lifting hooks arranged symmetrically with respect to the vertical plane of symmetry of the rail, a respective pivot having an axis extending in the direction of the track rail and mounting a respective lifting hook for pivoting into a rail engagin

Abstract: A levelling and shifting machine and a transmitter system (1) are used, the latter being installed on a carriage parked on the track and transmitting a spreading beam in the horizontal plane for levelling and a spreading beam in the vertical plane (Fr) for shifting, these beams defining an absolute measuring base. The receivers for levelling and shifting, which are installed on a measuring carriage of the machine, are designed for self-centering relative to the line of incidence of one of the said beams or the other during each measurement. In a curve of the track (3), the vertical beam (Fr) defines a cord of this curve, and the set position of the receiver defines the current value of the pitch of the curve (fm.sub.0, fm.sub.1 etc). A computer calculates the desired value of the pitch (f.sub.0, f.sub.1 etc.) and the variation (y.sub.0, Y.sub.1 etc.) between the two values, the latter variation determining the shifting correction.

Abstract: An electronic levelling apparatus using an inclinometer mounted to a platform for sensing deviations from the horizontal and generating an output signal representative thereof, filtering the inclinometer output signal to remove electromagnetic and radio frequency interference, level-shifting the filtered inclinometer output signal to establish both positive and negative threshold voltages, determining positive and negative voltage level shifts to generate a level control signal therefrom and transmitting the level control signal to an actuating mechanism for maintaining the platform level.

Abstract: Apparatus for continuously surveying and aligning railroad track has a measuring system with a leading point and a trailing point, both points being on the track center line. Two tensioned wires extend between these points, respectively, and a common intermediate point also on the track center line. At the trailing point a shadow board is located and this is arranged to interrupt an infrared beam extending between a projector at the leading point and a receiver behind the trailing point. A device measures continuously the angle between the two wires and this value is averaged and then subjected to mathematical manipulation in a computing device to derive an ordinate value for the shadow board which is automatically extended accordingly. The receiver then commands a track correction ram located adjacent the shadow board to move the track radially inwardly or outwardly until alignment between projector, receiver and shadow board causes the receiver to stop the lining action.

Abstract: A mobile track leveling, lining and tamping machine has a main frame supported on undercarriages for mobility on the track in an operating direction, a drive for propelling the main frame in the operating direction, a carrier frame trailing the main frame in the operating direction, a single support and guide carriage supporting and guiding the carrier frame at a rear end thereof in the operating direction and spaced from one of the undercarriages of the main frame in the direction of the track, a tamping unit mounted on the carrier frame between the one undercarriage and the support and guide carriage, the tamping unit immediately preceding the support and guide carriage in the operating direction, a track leveling and lining unit preceding the tamping unit in the operating direction, a pivotal connection pivotally supporting a front end of the carrier frame on the main frame, and an adjustment drive at the pivotal connection for adjusting the position of the carrier frame in relation to the main frame in th

Abstract: A continuously advancing track leveling, lining and tamping machine comprises a heavy main frame supported on two spaced apart undercarriages for continuous movement in an operating direction and a power plant, drives and operating controls as well as an operator's cab for operating the drives and controls mounted on the main frame. Two separate carrier frames are arranged between the two undercarriages of the heavy main frame, and a drive connected to the heavy main frame longitudinally displaces the carrier frames in relation to the main frame whereby the carrier frames may be intermittently advanced during the continuous movement of the heavy main frame, this drive having a displacement path corresponding to a distance between at least two successive ties.

Abstract: A mobile track leveling, lining and tamping machine comprising a main machine frame supported on undercarriages spaced apart in the direction of the track for mobility on the track in an operating direction, the track consisting of two rails fastened to successive ties resting on ballast; an operating unit comprised of a separate carrier frame supporting a ballast tamping assembly and a track leveling and lining assembly forwardly of the ballast tamping assembly, in the operating direction; a pivotal bearing supporting a front end of the operating unit on the machine frame; and a track stabilization assembly mounted on the main machine frame between the operating unit and a succeeding one of the undercarriages supporting the main machine frame on the track.

Abstract: The invention relates to a continuously advancing machine for works on a railway track, comprising a main chassis mounted on bogies and provided with a mobile auxiliary chassis supporting working members such as ballast tamping and track lifting/shifting units. The auxiliary chassis may move along the main chassis under the action of a bar for attachment to a chain driven by a motor and borne by a carriage, so as to advance, during the works, step by step with respect to the track while the machine progresses continuously. The reactions of inertia are entirely taken up by the track, via the carriage immobilized thereon thanks to grippers during the phases of advance of the auxiliary chassis and its working units.

Abstract: A mobile machine for leveling, lining and tamping a track has a heavy main frame supported on undercarriages for continuous movement in an operating direction, a power plant, a drive for continuously advancing the main frame along the track in the operating direction and a brake for stopping the advance of the main frame, the power plant, the drive and the brake carried by the main frame, and a lighter subframe pivotally and longitudinally adjustably connected to the heavy main frame. Tamping heads are mounted on the subframe for tamping ballast in intermittent tamping cycles under respective the ties at points of intersection of the two rails and the ties.

Abstract: A mobile machine for leveling, lining and tamping a track has a main frame supported on undercarriages for continuous movement in an operating direction, a power plant and operating controls carried by the main frame, and an elongated subframe pivotally and longitudinally adjustably connected to the main frame, the subframe having two ends and being arranged ahead of one of the undercarriages supporting the main frame, respective undercarriages supporting the subframe ends. Tamping heads are mounted on the subframe between the respective undercarriages for tamping ballast in intermittent tamping cycles under respective ties at points of intersection of the two rails and the respective ties. A track lifting and lining unit is associated with the two rails mounted on the subframe ahead of the tamping heads and arranged on the subframe between the respective undercarriages.

Abstract: A continuously advancing machine for leveling, lining and tamping a track has a machine frame supported on undercarriages for continuous movement in an operating direction, a power plant and operating controls carried by the machine frame, and a tool carrier frame having a rear end supported on an undercarriage. A tamping tool assembly associated with each rail is mounted on the tool carrier frame immediately ahead of the undercarriage supporting the rear tool carrier frame end for tamping ballast in intermittent tamping cycles under the ties at points of intersection of the two rails and the ties. Each tamping tool assembly is vertically movably mounted on the tool carrier frame and includes two pairs of vibratory and reciprocatory tamping tools spaced from each other in the operating direction so that each pair of tools is in vertical alignment with a respective one of two successive cribs.

Abstract: A mobile track leveling, lining and tamping machine has a machine frame supported on undercarriages for continuous movement in an operating direction, a power plant and operating controls carried by the machine frame, a tool carrier frame having a front end and a rear end, and an undercarriage supporting and guiding the tool carrier frame rear end on the track. Tamping tool assemblies are mounted on the tool carrier frame immediately ahead of the undercarriage supporting and guiding the tool carrier frame rear end for tamping ballast in intermittent tamping cycles under respective ties at points of intersection of the two rails and the ties in tangent and switch track sections and a track lifting and lining unit is associated with the two rails mounted on the tool carrier frame ahead of the tamping tool assemblies and is arranged on the tool carrier frame between two undercarriages spaced in the direction of the track for lifting and lining the track in tangent and switch track sections.

Abstract: A mobile machine for leveling, lining and tamping a track, which comprises a heavy main frame supported on two undercarriages spaced apart for continuous movement in an operating direction, a drive for continuously advancing the main frame along the track in the operating direction, an operator's cab, a power plant and operating controls on the main frame, a lighter subframe leading one of the undercarriages in the operating direction, tamping heads mounted on the subframe for tamping ballast in intermittent tamping cycles under respective ties at points of intersection of the two track rails and the respective ties, a tract lifting and lining unit associated with the two rails mounted on the subframe ahead of the tamping heads in the operating direction, the subframe and the tamping heads and track lifting and lining unit mounted thereon constituting an operating unit and the tamping, lifting and lining unit is arranged within sight of the operator's cab, and a drive connecting the lighter subframe to the he

Abstract: A mobile track switch leveling, lining and tamping machine comprises an elongated machine frame, two undercarriages spaced apart in the direction of elongation of the machine frame and supporting the machine frame for mobility on the track in an operating direction, and a respective carrier frame associated with each one of the track rails between the two undercarriages. Each carrier frame supports a tamping tool unit comprising tamping tools capable of tamping the ballast in a track switch, and a track leveling and lining unit comprising tools for lifting and laterally moving the track, the tools being capable of engaging the associated track rail in the track switch, the track leveling and lining unit preceding the tamping tool unit in the operating direction.