Abstract: The handle of a tie tamper is connected to its vibration generating motor, to which a beater is rigidly fixed to be vibrated thereby, by a combination of a Neidhart damper fixed to one end of the handle, a shackle-link pair fixed at one end to the square shaft of the damper, and an arcuate leaf spring pin-connected at its one end to the link pair and at its other end to the motor and by a two-bar linkage connected at its two ends via Neidhart dampers respectively to an intermediate part of the handle and to the motor, and a balance weight is provided at the pin joint between the two links of the two-bar linkage. This construction greatly reduces the vibration transmitted from the motor to the handle.

Abstract: The handle of a tie tamper is connected to its vibration generating motor, which vibrates a beater fixed thereto, by a combination of a Neidhart damper secured to one end of the handle, a shackle-like link pair fixed at its one end to the damper, and an arcuate leaf spring pin-connected at its one end to the other end of the link pair and at its other end to the motor and by a two-bar linkage connected at its two ends via Neidhart dampers respectively to an intermediate part of the handle and to the motor, a balance weight being provided at the pin joint between the two links of the two-bar linkage, and a strap connected at its ends to the handle and motor limits the extension of the two-bar linkage.

Abstract: Apparatus comprising a pair of tamping machines mounted in side-by-side disposition on a railway vehicle on a railway track for consolidating ballast supporting the railway track. Each tamping machine comprises two pairs of normally opposed tamping units juxtaposed on a carriage for simultaneous up-and-down motion therewith between a retracted and an operating position. Included in each tamping unit pair is a pair of tamping tools which, while being driven into ballast on opposite sides of a crosstie, are both vibrated and oscillated for compacting the ballast. For use of the machine at a railway switch or over guardrails, a swivelling mechanism comprising an adjusting bolt is provided for pivoting each pair of tamping units about vertical axes and holding the same in desired angular positions with respect to the carriage.