ES233003A1 - System for the control and regulation of railway circulation (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

System for the control and regulation of railway traffic, characterized in particular by the application of the following means, which can be considered separately or in combination: A) the vehicle has receiver devices sensitive to the state of the track circuits, a first source of signaling and command currents whose frequency is at all times proportional to its speed, a second source of signaling and command currents whose frequency can vary proportionally to the desired course of speed, and an apparatus that compares the two frequencies mentioned both to indicate, according to their differences, the maneuvers to be made, and to automatically send said maneuvers. B) the source of the variable frequency signaling and control currents is foreseen so that its frequency, defined by the cadence of the currents of the track circuits, begins to decrease according to a certain law when the vehicle exceeds a point where it has to start braking. C) to cause the variation of the frequency according to b) fixed devices are placed on the track, activated by the signals and acting on the equipment of the vehicles according to a). D) to cause the variation of the frequency according to b), the track relays are arranged so that they invert the polarity of the currents of the track circuits, this inversion acting on the vehicle equipment according to a). E) the second source of signaling and control currents according to a), is constituted by a small synchronous motor associated with a steering wheel, obtaining the lowering of its frequency by the interruption of the supply of said motor. F) in the case where the length of the track circuit does not correspond to the braking distance, at the entrance of the track circuit and at the start of the braking distance different track relays are provided, one of these relays being provided for not produce but a temporary investment according to d), while the other track relay produces a definite investment. (Machine-translation by Google Translate, not legally binding)