System of automatic notice to work brigades in vias ferreas (Machine-translation by Google Translate, not legally binding)

摘要

System to warn the approximation of a train to work brigades. This formed by two emitting sets (1,1 '') that are controlled with two captors (4,4 '') and that send their signals, well via phone (8), to a receiving unit (2) proposed in the area where the briagadas are working. The captors are placed at a certain distance from the work area; they are fixed through a rapid system to the rails (3) of the via ferrea and send a signal to the issuers when a large metal mass that will vary the reluctance of their magnetic circuits. (Machine-translation by Google Translate, not legally binding)