Improvements in and relating to automatic emergency braking and/or spragging and/or stopping devices for colliery tubs and the like

摘要

320,446. Cooke, J. Aug. 3, 1928. Applied by backward pressure of tractor or relaxation of pull; skid; sprags.-A device for arresting colliery tubs and like vehicles in the event of failure of the haulage means comprises a special anchor-truck A, C arranged at the head of a train of vehicles and having pivoted thereto on a shaft D, a member E having downwardly bent ends E1, E2 of which the end E1 is adapted to engage the track or a sleeper thereon while the end E2 is coupled to the haulage cable G and. by means of the link H, to the train of vehicles. A spring K attached to the truck frame at K2 and to the member E at F1 normally holds the member in the raised position against a stop L. If the cable G becomes inoperative the end E1 of the member E will be forced into the roadway by the pull on the link H and thus arrest the backward movement of the train. The member E is held in the lower position by spring catches M and it can be prevented from being lowered when desired by a slidable transverse bar L1.