Sleeper laying apparatus

Railways – Track layers – Distributers

Patent

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Details

E01B 2900

Patent

active

053479343

ABSTRACT:
A sleeper laying apparatus comprises a mobile chassis having a front portion in the nature of a full trailer furnished with unsprung road wheels (11) permitting it to travel along a bare rail bed. A dual chain storage conveyor (15,16,17,18,19) extends along the front portion of the chassis with supported top chain flights on which a file of sleepers (21A) may rest and be fed, when the storage conveyor is operated, towards the rear of the chassis. The chassis further comprises a trailing rear portion supporting an inclined gravity conveyor (26,27) able to receive sleepers (21A) from the storage conveyor and allow them to gravitate onto the track bed, and a hold back escapement mechanism (32,33,34,35,36,37) disposed above said gravity conveyor in the nature of a dual chain conveyor with abutment arms (37) projecting from its chains (36) into the path of sleepers (21C) on the gravity conveyor to control the movement of sleepers thereon. Intermittent, synchronized operation of the storage conveyor and escapement mechanism is effected by controllers, responsive to the forward travel of the chassis, so as to release sleepers from the gravity conveyor onto the track bed at predetermined intervals. The controllers include a center wheel (40) rolling on the track bed and a signal generator responsive to rotation of the wheel generating signals initiating each operation.

REFERENCES:
patent: 851982 (1907-04-01), Downey
patent: 1097006 (1914-05-01), Darden
patent: 1506953 (1924-09-01), Stubbs
patent: 1566570 (1925-12-01), App
patent: 3701320 (1972-10-01), Fearon et al.
patent: 4080903 (1978-03-01), Cicin-Sain
patent: 4094249 (1978-06-01), Theurer et al.
patent: 4207820 (1980-06-01), Cicin-Sain
patent: 4258626 (1981-03-01), Theurer et al.
patent: 4924042 (1990-05-01), Valditerra

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