Track lining

Claim 2

A track liner comprising a frame mounted for mobility on the track rails, a track lining unit mounted on the frame for engagement with the track rails, motor means for laterally moving the track lining unit engaged with the track rails for a distance along a path extending transversely of the track, a reference system determining said distance whereby the track is moved from a misaligned into a desired position, control means between the reference system and the motor means for operating the motor means at least until the track has been moved by the track lining unit for said distance, and a control system responsive to the control means and permitting said control means to continue operation of the motor means for moving the track laterally for an additional distance made proportional to the first-named distance by the control system.

Claim 3

The track liner of claim 1, wherein the control system includes a plurality of devices operational to make the additional distance proportional to different lengths of said first-named distance.

Claim 4

The track liner of claim 1, wherein the control system includes a time-delay device for continuing operation of the motor means for moving the track laterally for said additional distance.

Claim 5

The track liner of claim 1, comprising a second track lining unit spaced from the first-named unit in the direction of elongation of the track, the first-named unit being operable to move the track laterally for a total distance taking into consideration the springback of the track due to track tension after the lateral movement, and the second track lining unit being operable for moving the track laterally for a distance sufficient to provide accurate lining.

Claim 6

A track liner comprising a frame mounted for mobility on the track rails, a track lining unit mounted on the frame for engagement with the track rails, motor means for laterally moving the track lining unit engaged with the track rails for a distance along a path extending transversely of the track, a reference system determining said distance whereby the track is moved from a misaligned into a desired position, control means between the reference system and the motor means for operating the motor means at least until the track has been moved by the track lining unit for said distance, and a control system responsive to the control means and permitting said control means to continue operation of the motor means for moving the track laterally for an additional distance made proportional to the first-named distance by the control system, the control system including a plurality of time-delay devices for continuing operation of the motor means for moving the track laterally for said additional distance, each time-delay device including a time-delay relay set to produce a different length of said additional distance proportional to a different length of said first-named distance, and said control system further comprising means for selecting one of said time-delay relays in response to said control means.

Claim 7

A track liner comprising a frame mounted for mobility on the track rails, a track lining unit mounted on the frame for engagement with the track rails, motor means for laterally moving the track lining unit engaged with the track rails for a distance along a path extending transversely of the track, a reference system determining said distance whereby the track is moved from a misaligned into a desired position, control means between the reference system and the motor means for operating the motor means at least until the track has been moved by the track lining unit for said distance, and a control system responsive to the control means and permitting said control means to continue operation of the motor means for moving the track laterally for an additional distance made proportional to the first-named distance by the control system, the control system including a plurality of time-delay devices for continuing operation of the motor means for moving the track laterally for said additional distance, each time-delay device including a time-delay relay set to produce a different length of said additional distance proportional to a different length of said first-named distance, and said control system further comprising means for selecting one of said time-delay relays in response to said control means.

Claim 8

The track Liner of claim 5, wherein the motor means is hydraulically operated, the control means includes a hydraulic fluid feed line means to the motor means and valve means for discontinuing hydraulic fluid flow through said feed line means to the motor means, and a drive means is coupled to the relay selecting means, the drive means being actuated in response to the movement of the track lining unit.

Claim 9

The track liner of claim 6, wherein said drive means is a hydraulic motor, a branch hydraulic fluid feed line delivering hydraulic fluid to said hydraulic motor when the hydraulic fluid fluid feed line means delivers hydraulic fluid to the motor means.