ES295765A1 - Highway crossing protection system - Google Patents

Abstract

Level crossing protection system, each provided with a warning device for the traffic of the road in a section of several roads, and a signaling system to control the movement of trains, characterized in that it comprises the combination from: a) a neutral track circuit in each track limited by insulating joints at selected points within said section to divide it into zones, b) several overlapping track circuits with a chosen number of different frequencies lower than the number of such circuits, 1) each superimposed circuit adapted to be superimposed on said signaling system without additional insulating joints to detect the presence of a train on a preselected track segment; c) several encoder devices one for each of said track circuits superimposed, each one being operable continuously between a first and a second position; d) track connections for each of the track circuits superimposed, 1) each track connection controlled by the corresponding coding device in order to apply the associated superimposed track circuit, alternatively to each track of an adjacent pair chosen in said multiple track at a selected point, since said encoder device operates between its first and second position, thus being connected a superposed circuit of each of said different frequencies in each of said zones, 2) said connections being staggered in this way along said multiple track section to provide continuous detection of a moving train in any of the tracks; e) the circuits controlled by said superposed circuits acting to operate each warning device to prevent only the arrival of a train towards, the corresponding crossing of any direction in each way. (Machine-translation by Google Translate, not legally binding)