Abstract: A mobile machine for compacting ballast comprises a machine frame extending in a longitudinal direction and supported by undercarriages on the track rails, and a ballast bed stabilizing apparatus vertically adjustably mounted on the machine frame. The apparatus comprises a vibrator imparting to the apparatus vibrations extending in a horizontal plane and perpendicularly to the longitudinal direction, flanged rollers spaced apart in a direction extending perpendicularly to the longitudinal direction and supporting the apparatus on the track rails for movement therealong, each flanged roller being mounted on a stub shaft, and a spreading mechanism mounted between the spaced-apart flanged rollers for changing the distance therebetween.

Abstract: An ballast tamping assembly comprises four independently displaceable ballast tamping units arrayed in a line extending transversely to the machine frame elongation. Each ballast tamping unit comprises a carrier frame, a tamping tool carrier vertically adjustably mounted on the carrier frame, and a pair of vibratory tamping tools mounted on the tamping tool carrier for reciprocation in the track direction.

Abstract: An apparatus for placing a carriage linked to a frame of a track working machine on a track comprises a rail sensing element mounted on the carriage for sensing a respective track rail, the rail sensing element being positioned in the radial plane of the flanged wheel when the carriage is placed on the track and emitting a control signal in this position. A hydraulic drive for displacing the carriage transversely with respect to the track links the carriage to the track working machine frame. In response to the control signal, the operation of the hydraulic drive and the transverse displacement of the carriage is interrupted.

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 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 track working machine arranged for intermittent advancement along the track comprises a drive, a brake for braking the driven wheels at respective working sites between the intermittent advancement of the machine, a speedometer generating a signal indicating the speed of advancement and a device generating a signal indicating the peripheral speed of the driven wheels. A fully electronically operated control arrangement for avoiding spinning of the driven wheels at the start of the advancement of the machine and locking of the wheels at braking includes a circuit having an input receiving the signals and an output connected to the drive and brake for constantly maintaining the nominal desired value of the drive and brake moments and for reducing the traction and brake forces in dependence on any drive or brake slippage.

Abstract: A tamping head with a pair of vibratory and reciprocatory tamping tools mounted on a vertically adjustable carrier for immersion in the ballast in the cribs, with the ties positioned between the tools. Each tamping tool is constituted by a lever pivotal in a vertical plane about a transverse pivot, and stops are mounted on the carrier for setting at least three different reciprocating strokes for the tamping tools, with a remote-controlled multi-step drive for setting the stops.

Abstract: A vehicle with a spring-supported frame has torsion transmitting hydraulic cylinders arranged between the ends of the axles of the undercarriages and the frame. Each cylinder is in torsion transmitting connection with the frame and conduits interconnect corresponding cylinder chambers at each side of the vehicle.