Process for tamping railway tracks and a movable machine for eff

Details Process for tamping railway tracks and a movable machine for eff Process for tamping railway tracks and a movable machine for eff

1975-12-19

1977-03-08

Spar, Robert J.

Railways

Track layers

Tamper

104 7R, E01B 2716

Patent

active

040106926

ABSTRACT:
A process and a machine for tamping railway tracks so as to obtain the same degree of compactness of the ballast under all the sleepers of the track tamped by the machine. A movable tamping machine with vibratory tamping tools tamps the ballast between and under the sleepers. A pick-up device measures the amplitude of vibrations retransmitted by the ballast across the sleepers and the rails to a part of the machine which is maintained in non-elastic connection with one rail of the track. The pick-up is rigidly fixed to this part of the machine. A computer is provided to emit a control signal to a control device for stopping the compacting operation of the tools. This signal is emitted when a predetermined value (K) of increase in amplitude of the vibrations measured by the pick-up device is reached, this value being characteristic of the approach of the maximal degree of compactness of the treated ballast.

REFERENCES:
patent: 3401642 (1968-09-01), Fisher
patent: 3465688 (1969-09-01), Sauterel
patent: 3807311 (1974-04-01), Plasser et al.
patent: 3895583 (1975-07-01), Theurer

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